Value Collection -33709-1 Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION -33709-1 is a partially threaded hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling fixtures, and structural connections. It features a 7/8-9 UNC thread size and measures 4 inches in length under the head. The 3/4-inch hex drive accepts a standard hex key or Allen-head socket for installation and removal. Constructed from alloy steel with a black oxide coating, this cap screw provides solid mechanical performance and moderate corrosion resistance in shop and industrial environments. It meets ASME/ANSI B18.3 and ASTM A574 standards, confirming it is manufactured to recognized dimensional and mechanical property specifications.

This screw is suited for use in machine frames, jigs, fixtures, and general industrial assemblies where a flush or recessed drive fastener is required. The partial threading allows for precise clamping when the shank bears against a close-tolerance hole. Machinists, millwrights, and maintenance technicians commonly install this type of fastener in manufacturing facilities, fabrication shops, and field maintenance applications. It is sold in a minimum order quantity of 5 pieces.

Key Features

• 7/8-9 UNC thread size for high load-bearing capacity in standard unified coarse thread applications
• 4-inch length under head with partial threading for controlled clamping force
• 3/4-inch hex drive for use with standard hex keys or socket drive tools
• Alloy steel construction meets ASTM A574 mechanical property requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection in precision setups
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as an OEM-style and general-use replacement or stocking fastener for applications requiring 7/8-9 UNC partially threaded hex socket cap screws per ASME/ANSI B18.3.

Installation Notes

Install using a calibrated torque wrench with a 3/4-inch hex bit to achieve the appropriate torque for the joint material and application. Ensure mating threads are clean and free of debris before installation. De-energize and lock out any machinery before accessing fastener locations on powered equipment. Do not use impact drivers on precision-fit socket cap screws without confirming torque limits for the joint design.