Value Collection -33629-3 Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION -33629-3 is a hex socket cap screw designed for applications requiring a high-strength, compact-head fastener with a recessed drive. The screw features a 5/16-18 UNC thread and measures 5 inches in length under the head. Drive engagement is achieved with a 1/4-inch hex key. The alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards, providing reliable tensile and shear strength for demanding assemblies. A black oxide coating provides mild corrosion resistance and reduces light reflection on finished assemblies. Partially threaded along its length, the shank allows controlled clamping force across joined components.

This cap screw suits mechanical, structural, and industrial assembly work where a flush or low-profile head is required and socket-drive access is preferred over hex head or Phillips configurations. Typical applications include machine frames, fixture plates, equipment enclosures, and fabricated steel assemblies. Sold in a package quantity of 10, this screw is appropriate for both maintenance technicians and production environments requiring consistent fastener specifications.

Key Features

• 5/16-18 UNC thread for standard inch-series assembly compatibility
• 5-inch length under head with partial threading for proper clamping engagement
• 1/4-inch hex socket drive for use with standard hex keys and socket drivers
• Alloy steel construction meeting ASTM A574 for high-strength fastener requirements
• Black oxide finish provides mild corrosion resistance and a matte appearance
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard inch-series hex socket cap screw for use in any application specifying a 5/16-18 UNC partially threaded socket head cap screw per ASME/ANSI B18.3.

Installation Notes

Installation requires a 1/4-inch hex key or socket bit driver; use of the correct drive size prevents cam-out and rounding of the socket. Power down or de-energize any equipment before fastener service on live assemblies. Apply appropriate thread lubricant or threadlocker per the assembly specification. Follow applicable torque guidelines from the equipment manufacturer or referenced engineering standards for 5/16-18 alloy steel fasteners.