1/4-20 x 1 3/4 18-8 Stainless Steel Flat Head Cap Screw with Nylon Insert is a stainless countersunk fastener with a thread-mounted prevailing-torque element. 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. For example, a 1/4-20 x 1 flat head screw fits within one inch overall because the head is included in that length.

Typical applications include retrofit vibrating panels, replacement guards, and repair covers, where nothing proud should catch passing material or hands. For higher preload potential and a deeper socket, review 1960 Series 18-8 SHCS 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: 1/4-20
• Length (overall - includes head): 1 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.