5/8-11 x 3/8 1960 Series 18-8 Stainless Steel Socket Head Cap Screw with Nylon Insert fits replacement and production work where the exact stainless size and pellet feature matter. Nylon contact at the thread adds frictional resistance while preserving the standard internal hex drive arrangement.

Use it for packaging machinery, motion guards, or access panels after confirming thread engagement, drive access, and the mating material. The nylon element gives the joint a locking feature, but it also limits service temperature compared with an all-metal socket screw.

For countersunk installations, 18-8 Flat Head Socket Cap Screws with Nylon Insert keep the locking feature in a different head style. Cold Headers can help confirm the exact-size 1960 Series stainless nylon-insert part before quoting availability. 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: 5/8-11
• Length: 3/8 in.
• Drive Type: Internal Hex
• Locking Feature: Nylon insert providing prevailing torque
• Nylon Insert Diameter (P): 3/16 in.
• Nylon Insert Location (N): 5/16 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.