5/16" 18-8 Stainless Steel Lock Washers – Corrosion-Resistant – Qty 100

SKU: 3157
Product Type: Helical split lock washer
Size / Fit: 5/16" (for 5/16" screws/bolts; ~0.3125" nominal screw diameter)
Material: 18-8 (304) stainless steel
Finish: Plain stainless, typically passivated (no coating)
Function: Adds spring tension and edge bite to resist loosening from vibration/shock
Compatibility: Works with 5/16-18 UNC and 5/16-24 UNF fasteners; use with matching stainless hardware
Standards/References: ASME B18.21.1 (split lock washers)
Corrosion Resistance: Excellent—suitable for outdoor and marine environments
Magnetism: Non-magnetic to slightly magnetic (typical for 18-8)
Usage Notes: On soft/finished surfaces, place a flat washer under the lock washer to protect the mating surface
Package Quantity: 100 washers