Value Collection -48549-9 Hex Socket Cap Screw 3/4-16 Unf

Product Description

The VALUE COLLECTION -48549-9 is a partially threaded hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and maintenance environments. Sized at 3/4-16 UNF with a 4-inch length under head, this fastener is driven with a 5/8-inch hex key. Constructed from alloy steel with a black oxide coating, it provides solid corrosion resistance and surface hardness suited to demanding conditions. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for load-bearing assemblies where material grade and dimensional accuracy matter.

This screw is used wherever a recessed hex drive cap screw is required in precision mechanical assemblies, machine frames, jigs, fixtures, or general industrial equipment. The 3/4-16 UNF thread pitch is a fine-thread specification, offering improved torque retention and resistance to vibration loosening compared to coarse-thread alternatives. It is commonly installed by millwrights, maintenance mechanics, and industrial technicians working on equipment requiring controlled fastener engagement.

Key Features

• Thread size: 3/4-16 UNF fine thread for high torque retention
• 4-inch length under head for deep engagement in thick workpieces
• Partially threaded shank for precise shoulder fit in clearance holes
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance and reduced glare
• Conforms to ASME/ANSI B18.3 dimensional standard

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for 3/4-16 UNF tapped holes in industrial machinery, fixtures, and structural assemblies requiring alloy steel fasteners.

Installation Notes

Installation requires a 5/8-inch hex key or socket driver rated for the fastener grade. Always verify that the receiving thread is clean, properly tapped to 3/4-16 UNF specification, and free of debris before installation. Apply appropriate thread lubricant or fastener compound per the equipment manufacturer's torque specification. Power down and de-energize any equipment before performing fastener work on live machinery.