1/4-20 x 3/4 18-8 Stainless Steel Button Head Socket Cap Screw with Nylon Insert adds a nylon prevailing-torque element to a button head socket cap screw format. The locking pellet adds a prevailing-torque feature while the internal hex drive keeps installation compact from the top side.

Because the socket is shallower than a full socket head cap screw, compare 18-8 SHCS with Nylon Insert when clamp load and deeper drive engagement govern the joint. Typical applications include retrofit vibrating guards, replacement covers, and maintenance panels, where exposed hardware benefits from a smooth dome and exact thread-length match.

The nylon element limits service temperature compared with an all-metal screw; no numeric service limit is implied by this listing. For chloride-heavy or saltwater-adjacent service, 316 stainless with nylon insert is a non-catalog request Cold Headers can quote. Cold Headers has supplied specialty socket fasteners since 1962 and helps buyers source exact stainless sizes and uncommon lengths.

Technical Highlights

• Material: 18-8 Stainless Steel
• Thread Size: 1/4-20
• Length: 3/4 in.
• Head Style: Button Head
• Drive Type: Internal Hex
• Locking Feature: Nylon insert providing prevailing torque
• Nylon Insert Diameter (P): 7/64 in.
• Nylon Insert Location (N): 3/16 in. +/-1/2 pitch
• Head Dimensions: ASME B18.3

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.