Shoulder Bolts – Precision Fasteners for Moving Parts and Alignment
Product Description
Shoulder Bolts (also known as Stripper Bolts) are unique fasteners featuring a long, unthreaded cylindrical shoulder under the head, designed to act as dowel, shaft, or pivot point in assemblies requiring sliding or rotating movement. At SM Fasteners, our precision-machined shoulder bolts are made from high tensile alloy steel and stainless steel, ensuring strength, dimensional accuracy, and corrosion resistance.
They are commonly used in die sets, pulleys, linkage systems, and mechanical tools where alignment, shearing load resistance, and consistent rotation are required.
Applications
Shoulder bolts are essential in applications where parts move or align on a shaft. Their cylindrical shoulder provides a smooth bearing surface, making them ideal for:
Punch and die assembly
Robotics and automation jigs
Mechanical linkages in engines
Pivots in motion control systems
Mold assemblies
Industrial automation systems
Pulley and sprocket mounting
Electronic enclosure grounding
Technical Specifications
| Parameter | Details |
|---|---|
| Product Type | Shoulder Bolts (a.k.a. Stripper Bolts) |
| Standard | ISO 7379, ANSI B18.3 |
| Grades | 8.8, 10.9, 12.9, SS 304, SS 316 |
| Material | Alloy Steel, High Tensile Steel, Stainless Steel |
| Shoulder Diameter Range | 6 mm to 50 mm | 1/4” to 2” |
| Thread Type | Metric Coarse, UNC, UNF |
| Finish | Black Oxide, Zinc Plated, Passivated (for SS) |
| Thread Length | Custom as per standard or drawing |
| Hardness | Up to 45 HRC (for alloy steel) |
Why Choose Our Shoulder Bolts?
At SM Fasteners, we specialize in high-precision fastening solutions for industries that demand performance and reliability.
✅ Tight Tolerances – Machined to ISO standards for press-fit and slip-fit tolerances
✅ Superior Finish – Black oxide and zinc-plated finishes for longevity and wear resistance
✅ Custom Machining – Available in custom shoulder lengths and thread pitches
✅ Material Traceability – Full batch tracking and test documentation provided
✅ Ready Stock & Quick Turnaround – Most sizes ready to ship or produced within days
✅ Engineer-Approved – Used in critical motion systems and industrial machines
Packaging and Delivery
We follow strict industrial packaging protocols to protect every bolt:
Packaging Features:
Individually packed in anti-corrosion film (for stainless and alloy steel)
Bulk packed in durable cartons or wooden crates
Labels indicate size, grade, batch, and client PO
Bubble wrap or oil-coated finish (for rust-sensitive items)
Industries We Serve
Our shoulder bolts serve vital functions in industries such as:
Automotive & Electric Vehicles
Dies & Molding Machinery
Automation & Robotics
Aerospace Ground Equipment
Industrial Machinery
Tool & Die Manufacturing
Packaging Machinery
Documents Supplied
With every dispatch, we provide:
Mill Test Certificate (EN 10204 3.1)
Dimensional & Hardness Test Report
Surface Coating Certificate
RoHS / Compliance Declaration
Heat Treatment Report (on request)
Custom Drawings (for non-standard designs)
Request a Quotation
Looking for precision-made shoulder bolts for your application? Let us help.
📧 Email: susheel@smfastners.com
📞 Phone: +91 8968469570
💬 WhatsApp Chat: Click to Chat
🔩 SM Fasteners – Engineered Precision You Can Rely On