4-48 x 1/4 Cup Point Alloy Steel Socket Set Screw with Nylon Insert is specified when the drawing calls for alloy steel, a cup point, and a nylon locking pellet. Use the nylon-insert version when a plain cup point needs added thread friction after seating.

Tooling fixtures and production stops may use this part when adjustment must remain compact and accessible from a hex socket. Confirm thread size, length, hex key size, cup point geometry, pellet diameter, and pellet location before substituting another set screw.

Use Cold Headers when the requirement is specific: alloy steel body, cup point, internal hex drive, and nylon insert. A 316 stainless version with nylon insert is a non-catalog request Cold Headers can quote when the environment calls for that material.

Technical Highlights

• Point: Cup (approximately 0.55-0.62 x nominal diameter)
• Material: Alloy Steel
• Thread Size: 4-48
• 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.