Jam Nuts – The Ultimate Locking Companion for Secure Assemblies
Product Description
Jam Nuts are low-profile hex nuts typically used as a locking nut in conjunction with a standard nut to prevent loosening due to vibration or movement. They are also known as half nuts or thin nuts and are ideal for applications where space is limited or locking resistance is required without additional components.
Manufactured at SM Fasteners using high-quality raw materials and precision threading, our Jam Nuts are designed for tight tolerance, consistent thread engagement, and long-term stability. Available in both metric and inch sizes, we offer jam nuts in a range of finishes and materials to suit diverse industry needs.
Applications
Jam nuts are widely used in situations that require a locking mechanism without external washers or nylon inserts:
Double nut assemblies (locknut setup)
Adjustable components on threaded shafts
Electrical panel brackets and instruments
Hydraulic fittings and pipe clamps
Machinery components with frequent vibration
Tight spaces requiring low-profile fasteners
Technical Specifications
| Parameter | Details |
|---|---|
| Type | Jam Nut / Half Nut / Thin Hex Nut |
| Standard | DIN 439, ISO 4035, ASME B18.2.2 |
| Material | MS, SS 304, SS 316, Brass, High Tensile Steel |
| Grades | 4, 8, A2-70, A4-80 |
| Size Range | M3 to M48 | 1/8″ to 2” |
| Thread | Metric (Coarse/Fine), UNC, UNF |
| Finish | Black Oxide, Zinc Plated, Self-Colored, Nickel, Galvanized |
Why Choose Our Jam Nuts?
✅ Perfect for Locking in Vibration-Prone Applications
✅ Available in Thin Metric and Imperial Threads
✅ Manufactured as per DIN & ASME Standards
✅ Corrosion-Resistant Finishes for Harsh Environments
✅ Bulk Supply with 100% Thread Accuracy & Inspection
Packaging and Delivery
We understand the importance of precision components arriving intact:
Poly-packed sets or bulk loose packing
Printed boxes with nut grade, thread, and size
Barcoded labeling and QR-coded MTC references
Rust-protective film wrap for export boxes
Industries We Serve
Our jam nuts are in regular demand across:
Instrumentation and Control Equipment
Aerospace Mountings
Oil & Gas Pipelines and Fittings
Power Distribution Panels
Telecom Towers
General Engineering and Fabrication
Documents Supplied
Every dispatch from SM Fasteners includes:
Manufacturer’s Test Certificate (3.1 / 3.2)
Dimensional & Visual QC Report
Surface Treatment Certificate (Zinc, Black Oxide, etc.)
Packing List & Batch Traceability
ROHS/REACH/ISO Certification (on request)
Request a Quotation
Looking for top-grade Jam Nuts for your next project or assembly line?
📧 Email: susheel@smfastners.com
📞 Phone: +91 8968469570
💬 WhatsApp Chat: Click to Chat
SM Fasteners – Compact Strength, Consistent Locking, Global Reliability.