International Fastener
Standards Reference
A comprehensive reference guide to every major fastener standard — ASTM, DIN, ISO, BS EN, ASME, JIS and more. SM Fastners manufactures and certifies fasteners to all major international standards with full documentation and traceability.
ISO 9001:2015 Certified
EN 10204 Type 3.1 & 3.2
NACE MR0175 Compliant Grades
Third-Party Inspection Available
ASTM / ASME
DIN
ISO
BS / EN
JIS
NACE
ANSI
SAE
MSS
Filter:
American Society for Testing & Materials and the American Society of Mechanical Engineers. The most widely referenced standards for industrial fasteners in North America and globally in oil & gas, pressure vessels, pipelines and structural applications.
🇺🇸 USA · 60+ Standards
🇺🇸
ASTM A-Series
Ferrous Metals — Bolts, Nuts, Studs & Fastener Materials
The ASTM A-series covers specifications for steel fastener materials used in pressure vessel, pipeline, structural, and general engineering applications. These are the most widely cited standards globally for industrial bolting.
ASTM A193
Alloy Steel & Stainless Steel Bolting for High-Temperature Service
Covers bolts, screws, studs and stud bolts for pressure vessels, valves, flanges and fittings. Grade B7 (chromoly alloy) and B8 series (stainless) are the most widely used industrial bolting grades worldwide.
ASTM A194
Carbon & Alloy Steel Nuts for Bolts for High-Pressure / High-Temperature Service
Specifies heavy hex nuts used with A193 stud bolts. Grade 2H is the standard match for B7 bolts; Grade 8M is for stainless stud bolts in corrosive service.
ASTM A307
Low-Carbon Steel Externally & Internally Threaded Standard Fasteners
General-purpose low-carbon steel bolts and screws in Grades A and B. The most economical option for non-critical structural and mechanical applications.
ASTM A325 / A490
High-Strength Structural Bolts for Structural Steel Joints
A325 (medium-carbon steel) and A490 (alloy steel) cover high-strength bolts for structural steel connections, bridges, industrial buildings and towers. Now superseded by F3125 but widely specified by name.
ASTM A320
Alloy-Steel & Stainless Steel Bolting for Low-Temperature Service
Covers bolting materials for pressure vessels, valves and fittings in low-temperature and cryogenic service. Grade L7 (chrome-moly) and B8 stainless for impact-tested service to –100°F.
ASTM A563
Carbon & Alloy Steel Nuts — Grades & Mechanical Properties
Specifies hex nuts in Grades A, B, C, D, DH, DH3 for use with A307, A325 and A490 bolts. Grade DH and DH3 are for structural bolting applications.
ASTM F593 / F594
Stainless Steel Bolts, Hex Cap Screws & Studs / Stainless Steel Nuts
F593 covers stainless steel bolts and studs; F594 covers stainless steel nuts. Both cover Groups 1–4 covering all major austenitic, martensitic and ferritic grades.
ASTM F1554
Anchor Bolts — Steel, 36, 55, and 105 ksi Yield Strength
Covers headed, bent (L & J) and threaded and nutted anchor bolts for structural anchorage to concrete. Grade 55 is weldable; Grade 105 is high-strength.
Products Available to ASTM Standards:
Stud Bolts
Heavy Hex Bolts
Heavy Hex Nuts
Hex Bolts
Anchor Bolts
Threaded Rods
Washers
🇺🇸
ASME Standards
American Society of Mechanical Engineers — Piping & Pressure Vessel Bolting
ASME standards govern the design of pressure vessels, piping systems and flanged joints. ASME B16.5 is the definitive standard for stud bolts and heavy hex nuts used in flanged pipe connections worldwide.
ASME B16.5
Pipe Flanges and Flanged Fittings — Stud Bolt & Nut Dimensions
Defines stud bolt lengths, diameters and nut dimensions for flanged pressure piping systems from Class 150 to Class 2500. The global reference for oil, gas and chemical plant piping bolting.
ASME B18.2.1
Square, Hex, Heavy Hex and Askew Head Bolts & Hex Cap Screws (Inch)
Dimensional standard for hex bolts, heavy hex bolts and hex cap screws in inch series. Defines head dimensions, thread lengths and tolerances for all US-specification fasteners.
ASME B18.2.2
Square and Hex Nuts — Dimensions (Inch Series)
Dimensional standard for hex nuts, heavy hex nuts, hex jam nuts, hex slotted nuts and hex thick nuts in inch series. Companion document to B18.2.1.
ASME B18.22.1
Plain Washers — Dimensions (Inch Series)
Covers plain flat washers in Type A (narrow) and Type B (regular/wide) series. Defines inside diameter, outside diameter and thickness for all US washers.
ASME B1.1
Unified Inch Screw Threads (UNC, UNF, UNEF, UNS)
The definitive American thread standard covering coarse (UNC), fine (UNF), extra-fine (UNEF) and special (UNS) series. Thread class designations 1A/1B through 3A/3B.
Products Available to ASME Standards:
Stud Bolts (B16.5)Heavy Hex NutsPlain WashersHex Cap Screws
Deutsches Institut für Normung — German national standards that form the backbone of European and global metric fastener specifications. DIN standards are the most universally recognised metric fastener system worldwide.
🇩🇪 Germany · 50+ Standards
🇩🇪
DIN Standards
Metric Fastener Dimensions, Properties & Thread Forms
DIN standards define dimensions, tolerances and mechanical property requirements for metric fasteners. Most DIN standards have been adopted or harmonised with ISO counterparts, but the DIN designation remains widely used in engineering drawings and specifications.
DIN 931
Hexagon Head Bolts — Partially Threaded (Metric)
Standard hex bolts with partially threaded shank. The most widely produced metric bolt. Available M3 to M100 in property classes 4.6, 8.8, 10.9, 12.9 and stainless A2/A4.
DIN 933
Hexagon Head Screws — Fully Threaded (Metric)
Fully threaded hex head screws (bolts) in metric sizes. Thread extends to the underside of head. Used where maximum thread engagement is required.
DIN 934
Hexagon Nuts — Standard (Metric)
Standard style hex nut in metric dimensions. The world’s most commonly produced nut. Available in property classes 5, 6, 8, 10, 12 and stainless grades A2/A4.
DIN 912
Hexagon Socket Head Cap Screws (Allen Bolts)
Cylindrical head screws with internal hexagon (Allen) drive. Available in property classes 8.8 and 12.9, and stainless A2/A4. Widely used in machinery, tooling and precision equipment.
DIN 985
Hexagon Nylon Insert Lock Nuts (Nyloc) — Low Profile
Hex nut with nylon insert collar providing prevailing torque resistance. Prevents loosening from vibration without special tools. One-use locking design.
DIN 125 / 126 / 9021
Plain Washers — Standard, Large & Extra-Large OD
DIN 125A/B are the standard metric plain washers. DIN 9021 specifies large-OD (fender) washers with 3× outside diameter for improved load distribution on soft materials.
DIN 127 / 128 / 137
Spring Lock Washers — Split Ring, Curved & Wave
Spring washers that create elastic tension between bolt and joint to resist loosening. DIN 127 (split ring), DIN 128 (curved), DIN 137 (wave). Not suitable for dynamic or extreme-temperature service.
DIN 975 / 976
Threaded Rods (All-Thread) — Metric
Fully threaded bars in standard 1-metre lengths (DIN 975) or in specified lengths (DIN 976). Available in property classes 4.6, 4.8, 8.8, 10.9 and stainless A2/A4.
DIN 580 / 582
Lifting Eye Bolts & Eye Nuts
DIN 580 specifies shoulder type eye bolts for lifting and rigging; DIN 582 covers eye nuts. Rated working load limits (WLL) must be derated for angled loading.
DIN 7991
Hexagon Socket Countersunk Head Screws (Allen CSK)
Flat (90°) countersunk head screws with internal hex drive. Used for flush-mount fastening in machined components, fixtures and aesthetic assemblies.
DIN 6334
Hexagon Coupling Nuts (Long Hex / Extension Nuts)
Extended length hex nuts (3× nominal diameter) for joining threaded rods end-to-end or extending bolt lengths into structural assemblies and suspended ceilings.
Products Available to DIN Standards:
Hex Bolts DIN 931/933Hex Nuts DIN 934Allen Cap Screws DIN 912Nyloc Nuts DIN 985Washers DIN 125/127Threaded Rods DIN 975
International Organization for Standardization — truly international fastener standards adopted by 167 member countries. ISO fastener standards align closely with DIN and EN and cover dimensions, mechanical properties, thread tolerances and testing methods.
🌐 International · 40+ Standards
🌐
ISO Standards
Global Fastener Dimensions, Tolerances, Properties & Testing
ISO standards are the globally harmonised fastener specifications, replacing or aligning with DIN numbers in most cases. Widely specified in international projects where a neutral standard is required.
ISO 4014
Hexagon Head Bolts — Partially Threaded (replaces DIN 931)
International standard for partially threaded hex bolts. Dimensional equivalent of DIN 931. M1.6 to M64 in product grades A and B.
ISO 4017
Hexagon Head Screws — Fully Threaded (replaces DIN 933)
Fully threaded metric hex screws. Harmonised replacement for DIN 933. Used for maximum thread engagement in joint design.
ISO 4032 / 4033
Hexagon Nuts — Style 1 & Style 2 (replaces DIN 934)
Standard (Style 1) and thicker (Style 2) hex nuts in metric series. Matched to ISO 4014/4017 bolts. Cover property classes 5, 8, 10, and stainless grades.
ISO 4762
Hexagon Socket Head Cap Screws (replaces DIN 912)
Socket head cap screws in metric sizes M1.6 to M64. Property classes 8.8 and 12.9, stainless A2-70 and A4-80. The precision engineering standard fastener worldwide.
ISO 898-1 / 898-2
Mechanical Properties of Fasteners — Bolts & Nuts
Part 1 covers mechanical property requirements (tensile, yield, hardness, proof load) for bolts, screws and studs in property classes 3.6 through 12.9. Part 2 covers nuts. The master reference for metric fastener grades.
ISO 3506
Mechanical Properties of Stainless Steel Fasteners (A2, A4)
Part 1 (bolts) and Part 2 (nuts) cover property classes for austenitic (A2, A4), martensitic (C1) and ferritic (F1) stainless fasteners. Grade A4-80 is the standard for marine and chemical applications.
ISO 724 / 965
ISO Metric Screw Threads — Dimensions & Tolerances
ISO 724 defines the basic metric thread profile (60° V-thread). ISO 965 defines tolerances and fits for metric threads in classes 4g/6g (external) and 4H/6H (internal).
ISO 7089 / 7090 / 7091
Plain Washers — Normal, Chamfered & Hardened Series
ISO 7089 (normal series, no chamfer), 7090 (chamfered, for use with high-strength bolts), 7091 (small OD). All in metric dimensions. Harmonised with DIN 125.
British Standards (BS) and European Norms (EN) — widely specified in UK, Europe, Middle East and British-influenced markets including Australia, India and South Africa.
🇬🇧 UK / Europe · 25+ Standards
🇬🇧
BS / EN Standards
British & European Fastener Dimensional and Material Standards
BS and EN standards are widely used across European engineering projects and in British-influenced regions. Many BS fastener standards have been superseded by EN/ISO equivalents but remain specified in drawings and contracts.
BS 4190
ISO Metric Black Hexagon Bolts, Screws & Nuts — General Grade
Covers general-purpose hex fasteners to metric dimensions. “Black” refers to the as-manufactured (uncoated) finish. Property classes 4.6 and 8.8 in standard sizes.
BS 3692
ISO Metric Precision Hexagon Bolts, Screws & Nuts — Close Tolerance
Precision (close tolerance, grade A/B) metric hex fasteners for engineering applications requiring tighter dimensional control. Property classes 8.8 and 10.9.
BS 4320
Metric Plain Washers — Forms A through G
Covers seven washer forms with different OD/ID/thickness combinations. Form A is the narrowest; Form G is the largest OD. Widely specified in UK structural and civil engineering.
EN 14399
High-Strength Structural Bolting Assemblies for Preloading (HSFG)
European standard for high-strength friction grip (HSFG) bolt assemblies including HR (8.8) and HV (10.9) grades. Used for slip-critical connections in structural steelwork.
EN 10204
Material Test Certificates — Types 2.1, 2.2, 3.1 & 3.2
The definitive standard for material traceability documentation. Type 3.1 (manufacturer’s own inspection certificate) and 3.2 (jointly verified by manufacturer and an independent third party) are mandatory for most oil & gas and petrochemical projects.
Products with BS/EN Documentation Available:
All Metric FastenersStructural BoltsHSFG SetsEN 10204 3.1 MTCs
Japanese Industrial Standards — specified for automotive, electronics, shipbuilding and machinery manufactured or exported to Japan. JIS metric threads are nominally compatible with ISO but with slight differences in tolerances.
🇯🇵 Japan · 15+ Standards
🇯🇵
JIS Standards
Japanese Industrial Standards — Fastener Dimensions & Properties
JIS fastener standards are used in Japanese-designed equipment worldwide. Dimensional differences from DIN/ISO are minor but important for precision assemblies.
JIS B1180
Hexagon Head Bolts & Cap Screws (JIS Metric)
Covers JIS metric hex bolts in property classes 4.8, 6.8 and 8.8. JIS head heights are slightly narrower than DIN/ISO equivalents. Common in Japanese-built machinery and automotive.
JIS B1181
Hexagon Nuts — JIS Metric
JIS standard for metric hex nuts. Note that JIS nuts have slightly different width-across-flats (WAF) than ISO/DIN for some sizes — important when replacing fasteners in JIS-designed equipment.
JIS B1256
Plain Washers — JIS Metric (Regular & Large Series)
JIS plain washers in regular and large-OD series. Nominally compatible with ISO 7089/7090 but with slight OD differences at larger sizes.
JIS B1051
Mechanical Properties of Fasteners — Bolts, Screws & Studs
JIS equivalent to ISO 898-1. Covers property classes 4.8, 6.8, 8.8, 10.9 and 12.9 with mechanical requirements aligned to ISO but with JIS-specific test methods.
Specialised standards for sour service corrosion (NACE), dimensional/drive (ANSI) and automotive/aerospace grading (SAE). Critical for oil & gas H₂S environments, precision hex drive tools and vehicle-grade fasteners.
Sour Service · H₂S · Automotive
🔬
NACE / ANSI / SAE
Corrosion, Dimensional & Automotive / Aerospace Fastener Standards
NACE International (now AMPP) standards define material requirements for sour (H₂S) service environments. SAE grades cover automotive-specification fasteners. ANSI standards govern key dimensional aspects including hex key/socket drive sizes.
NACE MR0175 / ISO 15156
Petroleum Industry — Sour Service (H₂S) Material Requirements
The critical standard for material selection in oil & gas environments containing H₂S. Specifies maximum hardness, chemical composition limits and heat treatment requirements to prevent sulfide stress cracking (SSC) and hydrogen-induced cracking (HIC). Grades B7M and L7M are the NACE-compliant modified alloy steel fastener grades.
NACE SP0472
Prevention of Internal Corrosion in Carbon Steel Pipelines & Fasteners
Practice guide covering coating, material selection and inspection requirements for carbon steel fasteners in corrosive pipeline environments. Widely referenced by pipeline operators.
SAE J429
Mechanical & Material Requirements — Externally Threaded Fasteners
SAE inch-series property grades for automotive and industrial bolts. Grade 5 (medium carbon steel, 120 ksi) and Grade 8 (alloy steel, 150 ksi) are the most common. Identified by radial lines on bolt head.
ANSI B18.3
Socket Cap, Shoulder & Set Screws — Inch Series Dimensions
Defines dimensions for socket head cap screws, flat head socket screws, button head screws, socket shoulder screws and socket set screws in inch series.
A quick reference guide to ISO metric property classes, SAE inch grades, and ASTM material grades — the numbers stamped on every production fastener head.
ISO · SAE · ASTM Grade Reference
📊
ISO Metric Property Classes
Bolts & Screws · Classes 4.6 to 12.9 — ISO 898-1
| Property Class | Material | Min Tensile Strength | Min Yield (0.2% proof) | Hardness (HRC) | Strength Level | Typical Use |
|---|---|---|---|---|---|---|
| 4.6 | Low carbon steel | 400 MPa | 240 MPa | — | Low | General fabrication |
| 4.8 | Low carbon steel | 420 MPa | 340 MPa | — | Low | General / JIS preference |
| 5.6 | Low-medium carbon | 500 MPa | 300 MPa | — | Low-Med | General engineering |
| 6.8 | Medium carbon steel | 600 MPa | 480 MPa | — | Medium | Machinery |
| 8.8 | Medium carbon alloy (Q&T) | 800 MPa | 640 MPa | 22–32 | Medium-High | General industrial (most common) |
| 10.9 | Alloy steel (Q&T) | 1040 MPa | 940 MPa | 32–39 | High | Automotive, machinery |
| 12.9 | Alloy steel (Q&T) | 1220 MPa | 1100 MPa | 39–44 | Very High | Socket screws, critical joints |
How to Read a Property Class: 8.8
The first digit (8) × 100 = minimum tensile strength in MPa (800 MPa). The second digit (8) × 10% of tensile = yield ratio (80% of 800 MPa = 640 MPa). A metric fastener marked “8.8” has min tensile strength of 800 MPa and min yield of 640 MPa.
🇺🇸
SAE / ASTM Inch Grades
Bolts & Nuts — SAE J429 & ASTM A193/A194
| Grade / Class | Standard | Material | Min Tensile | Head Marking | Strength | Typical Use |
|---|---|---|---|---|---|---|
| Grade 2 | SAE J429 | Low carbon steel | 74 ksi | None | Low | General / non-critical |
| Grade 5 | SAE J429 | Med carbon steel Q&T | 120 ksi | 3 lines | Medium | Automotive, general |
| Grade 8 | SAE J429 | Alloy steel Q&T | 150 ksi | 6 lines | High | Automotive critical joints |
| Grade B7 | ASTM A193 | Cr-Mo alloy (4140) Q&T | 125 ksi | B7 | High | Flanged pressure piping |
| Grade B8M | ASTM A193 | 316 SS (A4) | 75 ksi (CW: 100) | B8M | Medium | Corrosive / HT service |
| Grade 2H | ASTM A194 | Med carbon steel Q&T | — | 2H | High | Heavy hex nut with B7 |
| A325 | ASTM F3125 | Med carbon steel Q&T | 120 ksi | A325 | High | Structural steel bolting |
Thread form definitions, pitch designations, tolerance classes and inspection requirements — covering metric ISO threads, unified inch threads, BSW/BSF and pipe threads.
ISO · UNC · UNF · BSW · NPT · BSP
ISO 724 / ISO 965
ISO Metric Thread (M)
M20 × 2.5
60° V-profile. Designation: M [diameter] × [pitch in mm]. Coarse pitch is implied if pitch is omitted. The global standard for metric fasteners.
M6 × 1.0
M12 × 1.75
M20 × 2.5
M36 × 4.0
M64 × 6.0
ASME B1.1
Unified National Thread (UNC/UNF)
1/2-13 UNC
60° V-profile (inch). Coarse (UNC) and Fine (UNF) pitch series. Designation: [fractional diameter]-[TPI] [series]. Dominant in North America and British-influenced markets.
1/4-20 UNC
3/8-16 UNC
1/2-13 UNC
3/4-10 UNC
1-8 UNC
ISO 7-1 / ASME B1.20
Pipe Threads (BSP / NPT)
G 1/2 / 1/2″ NPT
BSPP (G — parallel) and BSPT (R — tapered) per ISO 228/7. NPT (tapered) per ASME B1.20.1. Used for pressure-tight pipe and fitting connections worldwide.
G 1/4 (BSP)
R 1/2 (BSPT)
1/4″ NPT
1″ NPT
BS 84 / ASME B1.9
Whitworth Thread (BSW / BSF)
1/2″ BSW
55° rounded profile. BSW (coarse) and BSF (fine). Legacy British thread form still specified in maintenance, marine and some process industry drawings. Largely replaced by UNC/UNF.
1/4″ BSW
3/8″ BSW
1/2″ BSF
ASME B1.5 / DIN 103
ACME / Trapezoidal Thread
Tr 20 × 4
29° (ACME) or 30° (Trapezoidal) square-ish profile for power transmission and lead screws. High efficiency, easy disengagement. Used in vices, jacks and heavy machinery.
1″-5 ACME
Tr 20×4
Tr 40×6
ISO / Custom
Left-Hand & Special Threads
M20 × 2.5-LH
Left-hand threads (designated LH) for counter-rotating applications. Special pitches, multi-start and non-standard forms available from SM Fastners custom manufacturing.
M20 LH
3/4-10 LH
2-Start
Custom Pitch
Head Identification
Bolt Head Marking Reference
Every fastener head carries a marking identifying its property class and manufacturer. Use this quick reference to identify fasteners on-site.
8.8
ISO / DIN
ISO Property Class 8.8
Min tensile: 800 MPa
Min yield: 640 MPa
Hardness: 22–32 HRC
Most common metric grade
10.9
ISO / DIN
ISO Property Class 10.9
Min tensile: 1040 MPa
Min yield: 940 MPa
Hardness: 32–39 HRC
Automotive / machinery
12.9
ISO / DIN
ISO Property Class 12.9
Min tensile: 1220 MPa
Min yield: 1100 MPa
Hardness: 39–44 HRC
Socket screws, critical joints
B7
ASTM A193
ASTM A193 Grade B7
Min tensile: 125 ksi
Cr-Mo alloy (4140) Q&T
Flanged pressure piping
Matches A194 Grade 2H nut
A4-80
ISO 3506
ISO 3506 Grade A4-80
SS 316 austenitic stainless
Min tensile: 800 MPa
Marine, chemical, food grade
Cold-worked (CW) strength
5 ⁄⁄⁄
SAE J429
SAE Grade 5 (3 radial lines)
Min tensile: 120 ksi (≤1″)
Med carbon steel Q&T
Automotive / general industry
Inch series fasteners
8 ⁄⁄⁄⁄⁄⁄
SAE J429
SAE Grade 8 (6 radial lines)
Min tensile: 150 ksi
Alloy steel Q&T
Automotive critical joints
Inch series fasteners
B8M
ASTM A193
ASTM A193 Grade B8M
316 stainless steel
Min tensile: 75 ksi (annealed)
Corrosive / high-temp service
Matches A194 Grade 8M nut
±10%
Torque
Tolerance
Tolerance
Technical Reference
Recommended Tightening
Torque — Metric 8.8 Grade
Indicative torque values for ISO property class 8.8 medium carbon steel bolts with dry (unlubricated) threads. Reduce by 20% for lubricated (MoS₂ or oil) assembly. Always refer to design specification for critical joints.
| Size | Thread Pitch | Torque (Nm) — Class 8.8 | Torque (Nm) — Class 10.9 | Torque (Nm) — Class 12.9 |
|---|---|---|---|---|
| M6 | 1.0 | 10 Nm | 14 Nm | 17 Nm |
| M8 | 1.25 | 25 Nm | 35 Nm | 41 Nm |
| M10 | 1.5 | 49 Nm | 69 Nm | 81 Nm |
| M12 | 1.75 | 85 Nm | 120 Nm | 140 Nm |
| M16 | 2.0 | 210 Nm | 295 Nm | 350 Nm |
| M20 | 2.5 | 410 Nm | 580 Nm | 680 Nm |
| M24 | 3.0 | 710 Nm | 1000 Nm | 1170 Nm |
| M30 | 3.5 | 1400 Nm | 1980 Nm | 2320 Nm |
| M36 | 4.0 | 2450 Nm | 3460 Nm | 4050 Nm |
Values are indicative for dry, clean threads. Lubricated joints: multiply by 0.75–0.85. For critical pressure vessel or structural bolting, follow project-specific controlled tightening procedures.
Compliance
Certification & Compliance Documentation
Complete documentation package available with every order — from standard 2.1 test reports to fully witnessed EN 10204 3.2 inspection.
Quality Certifications
SM Fastners holds active quality certifications demonstrating systematic compliance with international manufacturing standards.
ISO 9001:2015 Quality Management System
MSME Government of India Registration
UKAF Member Certificate
Material Documentation
Every fastener lot is traceable to its original heat of raw material through our comprehensive documentation system.
EN 10204 Type 3.1 Mill Test Certificates
EN 10204 Type 3.2 (third-party witnessed)
PMI (XRF) test reports
NABL-accredited chemical analysis
Tensile, hardness & impact test reports
Third-Party Inspection
We accommodate buyer-nominated third-party inspection agencies at our manufacturing facility and testing laboratory.
SGS Group inspection & certification
Bureau Veritas (BV) inspection
Intertek inspection services
DNV GL / Lloyd’s Register
Buyer-supplied TPI agencies welcome
Export Documentation
Complete export documentation package prepared by our dedicated export team for every international shipment.
Certificate of Conformance (COC)
Packing list & weight certificates
Fumigation certificate (wooden crates)
Country-of-origin certificate
Commercial invoice & shipping documents
Mechanical Testing
In-house testing laboratory equipped with instruments for full mechanical property verification to international standards.
Universal Testing Machine (UTM) — tensile & proof load
Vickers / Rockwell / Brinell hardness testers
Charpy impact testing (low-temperature)
Dimensional inspection (CMM, comparators)
NDE & Special Testing
Non-destructive and specialist testing for high-integrity applications including nuclear, aerospace and sour service.
Ultrasonic testing (UT) — internal defects
Magnetic particle inspection (MPI/MT)
Liquid penetrant testing (PT)
Hydrogen embrittlement testing
SSC / SSCC testing per NACE TM0177
Standards-Compliant Export
Certified to Your Standard,
Delivered Worldwide
Delivered Worldwide
SM Fastners manufactures and certifies fasteners to ASTM, DIN, ISO, BS EN, JIS and all major standards for export to 40+ countries. Complete documentation with every order.
Need Compliant Fasteners?
Manufactured & Certified
to Your Exact Standard
Tell us your standard, grade, material and quantity — our team will respond within 48 hours with a competitive quote and confirm available certifications and documentation.