4-40 x 1/4 Cup Point 18-8 Stainless Steel Socket Set Screw with Nylon Insert pairs a cup point for shaft contact with a nylon pellet in the thread. The cup point's hollow rim bears on the shaft or mating part, while the nylon insert presses against the female thread to help resist back-out. 18-8 stainless steel is commonly selected for clean appearance, general corrosion resistance, and ordinary moisture exposure.
For food and beverage machinery adjustments, changeover stops, or equipment guards, check point contact, threaded engagement, and drive access before installation. For torque-once settings without a pellet, compare 18-8 Socket Set Screws in the appropriate point style.
Nylon inserts are installed in-house at the Cold Headers Chicago facility for supported set-screw configurations. Review the thread size, length, hex key size, point style, and set-screw pellet location before matching the part to a service record or drawing.
Technical Highlights
- Point: Cup point, approx. 0.55-0.62 x nominal dia.
- Material: 18-8 Stainless Steel
- Thread Size: 4-40
- Length: 1/4 in.
- Drive: Internal Hex
- Hex Key Size: 0.050 in.
- Locking Feature: Nylon insert providing prevailing torque
- Nylon Insert Diameter (P): 1/16 in.
- Nylon Insert Location (N): 3/32 in. +/-1/2 pitch
- Dimensional Standard: ASME B18.3
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
