S-93711A600 0.322" ID x 0.457" OD ASME B18.21.1 Split Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through the split lock design, preventing fastener loosening in high-stress applications
• Exceptional corrosion protection with black-oxide coated 18-8 stainless steel construction for harsh industrial environments
• Precise dimensional compatibility with 0.322" ID and 0.457" OD ensuring perfect fit for 5/16" screws
• Enhanced mechanical durability with Rockwell C35 hardness maintaining structural integrity under repeated loads
• Industry-standard compliance meeting ASME B18.21.1 specifications for reliable performance
• Environmental regulation adherence with RoHS 3 and REACH compliance for global industrial use
• Optimized thickness design at 0.093" providing effective spring action without compromising space constraints

Professional Applications & Engineering Value

These black-oxide 18-8 stainless steel split lock washers deliver critical vibration resistance in demanding industrial assemblies where fastener security is paramount. The split lock washer type creates continuous spring tension against both the bearing surface and fastener head, effectively countering rotational forces that cause loosening in machinery, automotive, and heavy equipment applications. The black-oxide surface treatment on 18-8 stainless steel provides an additional layer of corrosion protection while maintaining the material's inherent resistance to chemicals and moisture. Engineered to ASME B18.21.1 standards, these washers ensure consistent performance in inch-system applications requiring reliable locking action for 5/16" screws across manufacturing, construction, and maintenance operations where vibration and thermal cycling pose constant challenges to joint integrity.

Specification Summary & Compliance

This standard split lock washer features precise dimensions of 0.322" inner diameter, 0.457" outer diameter, and 0.093" thickness specifically designed for 5/16" screw applications. Manufactured from 18-8 stainless steel with black-oxide coating and hardened to Rockwell C35, the component meets all dimensional and mechanical requirements of ASME B18.21.1 specification. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility while delivering reliable locking performance in industrial fastener systems.