4-40 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 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 countersunk hinge hardware, latch plates, and access doors, 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 can handle supported non-catalog pellet-size requests through in-house pelletizing.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
