Value Collection 15277PR Hex Socket Cap Screw 3/8-16 Unc

Product Description

The VALUE COLLECTION 15277PR is a hex socket cap screw designed for applications requiring high clamping strength in a compact head profile. Sized at 3/8-16 UNC with a 4-inch length under head, this fastener is partially threaded and driven with a 5/16-inch hex key. Constructed from alloy steel with a black oxide finish coating, it provides corrosion resistance and reduced surface glare. The ASME/ANSI B18.3, ASTM A574, and IFI 124 standards govern its dimensional and mechanical requirements, making it a traceable, specification-grade fastener suited for demanding assemblies in mechanical, industrial, and structural applications.

This screw is used in general-purpose machine assembly, fixturing, tooling, and equipment fabrication where a flush or low-profile head is required. The partial threading allows for shank engagement in through-hole applications, which supports accurate alignment and controlled clamping load. Machinists, millwrights, maintenance technicians, and fabricators install this fastener across a broad range of industrial settings including manufacturing plants, commercial construction, and machine shops.

Key Features

• 3/8-16 UNC thread size for standard American coarse-thread engagement
• 4 inches length under head for deep clamping reach in thick stock applications
• Partially threaded shank supports precise hole alignment and load distribution
• 5/16-inch hex socket drive for standard Allen key or hex bit installation
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish coating provides mild corrosion resistance and low-glare surface

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any 3/8-16 UNC tapped hole application where a socket head fastener is specified.

Installation Notes

Install using a 5/16-inch hex key or hex socket bit. Verify that the receiving tapped hole meets 3/8-16 UNC thread specifications before installation. Clean threads and seating surfaces before assembly to ensure proper clamping load. Follow applicable torque specifications from your project engineering documentation or relevant industry standards for the fastener grade and material being joined.