5/16-18 18-8 Stainless Nylon Insert Hex Lock Nuts Qty 50 | Stainless Steel

SKU: 3127
Product Type: Nylon-insert (nyloc) hex lock nut
Thread Size: 5/16-18 UNC (coarse), 18 TPI, right-hand
Thread Class: 2B (internal)
Material: 18-8 (304) stainless steel
Insert: Nylon 6/6 prevailing-torque ring
Finish: Plain stainless, typically passivated (no coating)
Across Flats (Wrench Size): 1/2 in (standard for 5/16″ hex)
Profile/Height: Standard nyloc hex pattern
Temperature Range (functional): −40°F to 250°F (limited by nylon insert)
Corrosion Resistance: Excellent for outdoor, marine, and industrial use
Magnetism: Non-magnetic to slightly magnetic (typical for 18-8)
Standards/References: ASME B1.1 (threads), ASME B18.16.6 (nylon-insert locknuts), ASME B18.2.2 (hex nut form)
Reuse Guidance: Nylon insert may be reused a limited number of times; prevailing torque decreases with cycles
Recommended Mating Hardware: 5/16-18 stainless bolts/studs; optional stainless washers
Package Quantity: 50 nuts