1/4-20 x 3/4 18-8 Stainless Steel Flat Head Cap Screw with Nylon Insert gives buyers an exact overall length for a countersunk screw, not an under-head measurement. A buyer moving from socket head cap screws should remember that flat heads are not measured from under the head. The 82-degree flat head needs a matching countersink cut cleanly and concentrically so the cone bears correctly and the head seats true.

Typical applications include countersunk hinge hardware, latch plates, and access doors, where nothing proud should catch passing material or hands. When chloride-heavy or saltwater-adjacent service drives material selection, ask Cold Headers about non-catalog 316 stainless nylon-insert options.

The 18% chromium and 8% nickel austenitic stainless material is commonly selected for general corrosion resistance, clean appearance, and ordinary washdown exposure. For supported flat head cap-screw requests, nylon inserts are installed in-house at the Chicago facility.

Technical Highlights

• Material: 18-8 Stainless Steel
• Thread Size: 1/4-20
• Length (overall - includes head): 3/4 in.
• Head Style: 82° Countersunk Flat
• 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.