Value Collection 33642 Hex Socket Cap Screw 3/8-16 Unc

Product Description

The VALUE COLLECTION 33642 is a partially threaded hex socket cap screw designed for mechanical fastening applications requiring a recessed drive profile. Sized at 3/8-16 UNC with a 3-inch length under head, it accepts a 5/16-inch hex (Allen) key drive. Constructed from alloy steel with a black oxide finish, the fastener delivers solid tensile performance in moderate-to-high-load assemblies while the black oxide coating provides basic corrosion resistance and reduces light reflection in service environments. Machinists, millwrights, and maintenance technicians install this fastener across industrial, structural, and equipment assembly tasks where a flush or countersunk socket-drive profile is required.

This socket cap screw is suited for use in machinery frames, jig and fixture builds, equipment mounting brackets, and general mechanical assemblies in both production and maintenance settings. The 3/8-16 UNC coarse thread engages reliably in standard tapped holes and threaded inserts. Partial threading allows the unthreaded shank to act as a shoulder section in clearance-hole applications, helping maintain alignment under shear loading. The black oxide alloy steel construction is appropriate for dry or lightly oiled indoor environments.

Key Features

• 3/8-16 UNC coarse thread for compatibility with standard tapped holes and threaded inserts
• 3-inch length under head on a partially threaded shank for shoulder-style shear resistance
• 5/16-inch hex socket drive accepts standard Allen keys and hex bit drivers
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 fastener standards
• Black oxide finish provides basic corrosion resistance and a low-reflectance appearance

Compatibility

Designed as an OEM-style replacement or standard fastener for any application requiring a 3/8-16 UNC partially threaded hex socket cap screw per ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation is performed using a 5/16-inch hex key or hex bit driver; ensure the drive tool is fully seated before applying torque to avoid rounding the socket. Verify the receiving tapped hole is clean, properly threaded to 3/8-16 UNC, and free of debris before fastener insertion. Apply a thread lubricant or anti-seize compound as appropriate for the service environment and torque to the value specified by the equipment manufacturer or structural design. This fastener is intended for installation by qualified machinists, maintenance technicians, or millwrights following applicable shop or facility standards.