3/8-16 x 1/4 18-8 Stainless Steel Flat Head Cap Screw with Nylon Insert uses an 82-degree countersunk head for fastening where surface projection must be minimized. The inch-series flat head angle is 82 degrees; metric flat heads are commonly 90 degrees, so the countersink angle should be checked before substitution.

Typical applications include sliding machine covers, flush access panels, and service plates, where nothing proud should catch passing material or hands. For a low-profile head without cutting a countersink, compare 18-8 Button Head Socket Cap Screws with Nylon Insert.

The nylon pellet presses against the mating thread to provide prevailing torque without changing the countersunk head geometry. Cold Headers has supported specialty socket fastener sourcing since 1962, including exact stainless sizes and uncommon lengths.

Technical Highlights

• Material: 18-8 Stainless Steel
• Thread Size: 3/8-16
• Length (overall - includes head): 1/4 in.
• Head Style: 82° Countersunk Flat
• Drive Type: Internal Hex
• Locking Feature: Nylon insert providing prevailing torque
• Nylon Insert Diameter (P): 9/64 in.
• Nylon Insert Location (N): 7/32 in. +/-1/2 pitch
• Head Dimensions: ASME B18.3

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