Holo-krome 72182 Hex Socket Cap Screw 3/8-16 Unc Alloy Steel

Product Description

The HOLO-KROME 72182 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and structural connections. It features a 3/8-16 UNC thread pattern with a 4-1/2 inch length under head and a 5/16 inch internal hex drive. The fastener is manufactured from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces light glare on finished assemblies. Partial threading along the shank allows the unthreaded portion to bear shear loads, making this screw well suited for precision clamping and load-bearing joint applications. Installation is performed with a standard hex key or Allen driver.

This screw is used in a wide range of industrial and commercial applications where a low-profile, high-strength cap screw is required. Typical uses include machine frames, fixture plates, tooling jigs, conveyor components, and mechanical enclosures. The 3/8-16 UNC thread is a common coarse-thread standard, making replacement straightforward in most maintenance and repair situations. This fastener meets ASME B18.3 and ASTM A574 standards, confirming dimensional and mechanical property compliance for demanding service conditions.

Key Features

• 3/8-16 UNC coarse thread for broad compatibility with standard tapped holes
• 4-1/2 inch length under head accommodates thicker workpiece stacks
• Partially threaded shank carries shear loads and improves joint alignment
• Alloy steel construction delivers high tensile and proof load strength
• Black oxide finish provides mild corrosion protection and a low-reflectance appearance
• Meets ASME B18.3 and ASTM A574 standards for dimensional and mechanical compliance

Compatibility

Designed as a standard-dimension hex socket cap screw per ASME B18.3, suitable for any tapped or clearance hole application calling for a 3/8-16 UNC partially threaded socket cap screw in alloy steel.

Installation Notes

Installation is typically performed by a maintenance technician or machinist using a 5/16 inch hex key or T-handle driver. De-energize and lock out any equipment before fastener removal or installation per applicable OSHA and facility lockout/tagout procedures. Apply thread lubricant or thread-locking compound as required by the joint specification. Avoid over-torquing, which can strip the tapped hole or damage the socket drive recess.