Value Collection 33639 Hex Socket Cap Screw 3/8-16 Unc

Product Description

The VALUE COLLECTION 33639 is a partially threaded hex socket cap screw designed for secure mechanical fastening in industrial and trade applications. Sized at 3/8-16 UNC with a 2.25-inch length under head, this fastener accepts a 5/16-inch hex drive. The alloy steel construction provides high tensile strength, while the black oxide finish offers moderate corrosion resistance and reduced surface reflectivity. Licensed tradespeople and maintenance mechanics commonly specify this style of socket cap screw where a flush or recessed fastener head is required.

This socket cap screw is suited for general mechanical assembly, equipment maintenance, and structural fastening tasks in manufacturing, industrial maintenance, and trade service environments. The 3/8-16 UNC thread form is one of the most common coarse-thread sizes in inch-series fastener applications, making this screw compatible with a wide range of tapped holes and threaded inserts found in machinery, fixtures, and structural assemblies. Partial threading allows the unthreaded shank to bear shear loads in fitting joints.

Key Features

• 3/8-16 UNC coarse thread for broad compatibility with standard tapped holes
• 2.25-inch length under head suits deeper fastening applications
• Partially threaded shank provides shear load capacity at joint interfaces
• Alloy steel construction delivers high tensile strength per ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide finish reduces surface reflectivity and provides light corrosion resistance
• 5/16-inch hex socket drive for use with standard hex keys and socket drivers

Compatibility

Designed as an OEM-style replacement or direct-use fastener for applications requiring 3/8-16 UNC inch-series socket cap screws in standard tapped holes and threaded assemblies.

Installation Notes

Installation is typically performed by maintenance mechanics, millwrights, or trade technicians using a 5/16-inch hex key or Allen-drive socket. Ensure the mating tapped hole is clean, undamaged, and to 3/8-16 UNC specification before driving. Do not exceed fastener torque ratings for the alloy steel grade and finish. Always de-energize or lock out equipment per applicable safety procedures before replacing or tightening fasteners in live assemblies.