5/16-18 x 3 1960 Series 18-8 Stainless Steel Socket Head Cap Screw with Nylon Insert pairs stainless construction with a nylon locking pellet for joints exposed to moisture and vibration. Nylon contact at the thread adds frictional resistance while preserving the standard internal hex drive arrangement.
This size is often reviewed for automation equipment, robotic end-of-arm tooling, and stainless brackets when a stainless cap screw must retain a familiar socket head form. The 18% chromium and 8% nickel austenitic stainless material is used for general corrosion resistance and a clean appearance in ordinary industrial environments.
For rounded exposed heads with the same locking concept, review 18-8 Button Head Socket Cap Screws with Nylon Insert. Since 1962, Cold Headers has helped buyers locate specialty socket fasteners for production, repair, and distributor requirements. The 1960 Series name identifies the modern ASME B18.3 head-proportion standard for socket head cap screws, successor to the older 1936 series, not a year of manufacture.
Technical Highlights
- Series: 1960 Series
- Material: 18-8 Stainless Steel
- Thread Size: 5/16-18
- Length: 3 in.
- Drive Type: Internal Hex
- Locking Feature: Nylon insert providing prevailing torque
- Nylon Insert Diameter (P): 1/8 in.
- Nylon Insert Location (N): 13/64 in. +/-1/2 pitch
- Head Dimensions: ASME B18.3, 1960 Series
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
