Holo-krome 72410 Hex Socket Cap Screw 1-1/4-7 Unc

Product Description

The HOLO-KROME 72410 is a heavy-duty hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and trade service environments. It features a 1-1/4-7 UNC thread size and measures 5-1/2 inches in length under the head with partial threading. The drive is a 7/8-inch hex socket, requiring an appropriately sized Allen or hex key. Constructed from alloy steel with a black oxide finish coating, this fastener meets ASME B18.3 and ASTM A574 standards, making it suitable for demanding structural and mechanical assemblies where tensile strength and corrosion resistance are priorities.

This cap screw is used in heavy equipment assembly, industrial machinery mounting, structural steel connections, and other applications requiring large-diameter, high-strength fasteners. The partial threading allows for clamping force concentration at the joint without threading the full shank length. Typical installers include millwrights, pipefitters, mechanical contractors, and maintenance technicians working on industrial or commercial equipment.

Key Features

• 1-1/4-7 UNC thread provides a coarse-pitch profile suited for thick stock and high-load joints
• 5-1/2-inch length under head with partial threading for optimized clamping performance
• 7/8-inch hex socket drive for use with standard hex keys or socket drivers
• Alloy steel construction meets ASTM A574 for high tensile strength requirements
• Black oxide finish coating provides mild corrosion resistance and reduces light reflection
• Conforms to ASME B18.3 dimensional standards for consistent fitment and interchangeability

Compatibility

Designed as an OEM-style and aftermarket replacement hex socket cap screw conforming to ASME B18.3 and ASTM A574 standards, suitable for any application requiring a 1-1/4-7 UNC partially threaded socket cap screw.

Installation Notes

Installation should be performed by a qualified mechanic or millwright using a properly sized 7/8-inch hex key or driver. Ensure mating threads are clean and free of debris before installation. Consult equipment manufacturer torque specifications and applicable fastener standards before final tightening. Always de-energize and lock out any machinery before performing fastener service or replacement.