Value Collection 33613 Hex Socket Cap Screw 1/4-20 Unc

Product Description

The VALUE COLLECTION 33613 is a hex socket cap screw designed for secure, high-strength fastening in mechanical assemblies and fabrication applications. Manufactured from alloy steel with a black oxide finish, this fastener resists corrosion and withstands demanding service conditions. The screw uses a 3/16-inch hex drive and features a 1/4-20 UNC thread form with a 3-1/2-inch length under head. The partial threading allows for strong clamping force between joined components. Machinists, millwrights, and maintenance technicians install this type of fastener across a wide range of industrial, commercial, and OEM equipment applications.

This screw is suited for use in mechanical assemblies where a recessed drive is required to allow flush or countersunk installation. Typical applications include machine frames, tooling fixtures, equipment panels, and structural sub-assemblies. The 1/4-20 UNC thread is a standard coarse-thread designation widely used in North American manufacturing environments. The black oxide coating provides mild corrosion resistance and reduces light reflection in precision equipment settings.

Key Features

• 1/4-20 UNC coarse thread for broad compatibility with standard tapped holes
• 3-1/2-inch length under head accommodates thicker material stacks
• Partial threading provides strong clamping load between fastened surfaces
• 3/16-inch hex socket drive allows use of standard Allen or hex key tools
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide finish offers mild corrosion resistance and reduced reflectivity

Compatibility

Designed as a standard 1/4-20 UNC hex socket cap screw for use in any application requiring an ASME/ANSI B18.3 or ASTM A574 compliant fastener in a matching tapped or through-hole assembly.

Installation Notes

Install using a 3/16-inch hex key or Allen driver. Ensure the mating tapped hole is clean, properly formed to 1/4-20 UNC specifications, and free of debris before installation. Apply appropriate thread lubricant or thread-locking compound per your assembly requirements. Always de-energize and lock out equipment before accessing fasteners on powered machinery.