Value Collection 307050PR Hex Socket Cap Screw 4-40 Unc

Product Description

The VALUE COLLECTION 307050PR is a partially threaded hex socket cap screw designed for precision fastening in mechanical assemblies, fixtures, and equipment. Sized at 4-40 UNC with 1 inch of length under the head, it is driven by a 5/64 inch hex key. Manufactured from alloy steel with a black oxide finish, it meets ASTM A574 standards for tensile strength and dimensional accuracy. This screw is a practical choice for machinists, maintenance technicians, and assemblers working with close-tolerance metal components.

This fastener suits residential and commercial applications wherever a compact, high-strength socket cap screw is required. Common install scenarios include machine tool fixtures, electronics enclosures, jigs, and precision mechanical assemblies. The 4-40 UNC thread is a standard fine-pitch coarse designation for Number 4 machine screws, commonly found in instrumentation, small motors, and structural sub-assemblies requiring secure clamping force in limited-clearance areas.

Key Features

• 4-40 UNC thread for compatibility with standard Number 4 machine screw tapped holes
• 1 inch length under head for medium-depth fastening applications
• Partially threaded shank provides a shoulder section for improved alignment
• 5/64 inch hex drive for use with standard Allen or hex key sets
• Alloy steel construction meets ASTM A574 tensile strength requirements
• Black oxide finish provides moderate corrosion resistance in dry indoor environments

Compatibility

Designed as a standard 4-40 UNC hex socket cap screw suitable for use in any application requiring an ASTM A574 alloy steel fastener with a 5/64 inch hex drive and 1 inch length under head.

Installation Notes

Install using a correctly sized 5/64 inch hex key or Allen driver to avoid rounding the socket. Ensure the mating tapped hole is clean and free of debris before threading. Do not exceed the rated seating torque for a 4-40 fastener as over-torquing alloy steel screws at this size can cause thread stripping or head failure. Minimum order quantity for this part is 100 pieces per order.