In heavy equipment where the screw is adjusted from the socket end, the 1/4-28 x 1/2 Cup Point Alloy Steel Socket Set Screw with Nylon Insert keeps the drive compact. The cup point is selected for localized holding contact; final selection still depends on shaft material, load, and access.

Pulley and sheave shafts can use this style when an internal hex drive and locking thread feature are both specified. Confirm thread size, length, hex key size, cup point geometry, pellet diameter, and pellet location before substituting another set screw.

Since 1962, Cold Headers has helped industrial buyers source specialty socket products for repair, replacement, and production needs.

Technical Highlights

• Point: Cup (approximately 0.55-0.62 x nominal diameter)
• Material: Alloy Steel
• Thread Size: 1/4-28
• Length: 1/2 in.
• Drive: Internal Hex
• Hex Key Size: 1/8 in.
• Locking Feature: Nylon insert providing prevailing torque
• Nylon Insert Diameter (P): 7/64 in.
• Nylon Insert Location (N): 3/16 in., +/-1/2 pitch
• Dimensional Standard: ASME B18.3

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.