Value Collection 40249 Hex Socket Cap Screw 7/16-20 Unf

Product Description

The VALUE COLLECTION 40249 is a partially threaded hex socket cap screw designed for applications requiring precise fastening with a recessed drive. Built from alloy steel with a black oxide finish, this fastener delivers strength and corrosion resistance in a compact form. The 7/16-20 UNF thread profile provides fine-thread engagement suitable for high-load or vibration-prone assemblies. The 3/8 inch hex drive accepts standard hex keys and hex bits for installation in confined spaces. With 2 inches of length under the head and partial threading, it is suited for clamping applications where thread engagement depth matters. Mechanical contractors, pipefitters, and industrial maintenance technicians commonly spec this type of fastener.

This cap screw is used in mechanical assemblies, equipment mounting, and structural fastening across a wide range of industrial and trade applications. The fine UNF thread series makes it appropriate for metal-to-metal joints where precise torque control and resistance to loosening under vibration are required. It is sold in multiples of 25, making it practical for service shops and contractors maintaining a bench stock of common fasteners.

Key Features

• 7/16-20 UNF fine thread for high-load, vibration-resistant joints
• 2 inch length under head with partial threading for clamping applications
• 3/8 inch hex socket drive for use with standard hex keys or hex bit drivers
• Alloy steel construction meets ASTM A574 strength requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 7/16-20 UNF partially threaded fastener with a 3/8 inch hex drive.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using a properly sized 3/8 inch hex key or hex bit. De-energize and lock out any equipment before fastener service per applicable OSHA lockout/tagout procedures. Do not reuse fasteners that show signs of thread damage, galling, or deformation. Torque to the value specified by the equipment manufacturer for the joint material and fastener grade.