Value Collection -33718-7 Hex Socket Cap Screw 1-8 Unc

Product Description

The VALUE COLLECTION -33718-7 is a partially threaded hex socket cap screw engineered for heavy-duty fastening applications. It features a 1-8 UNC thread size and measures 6-1/2 inches in length under the head, making it suited for deep-reach bolting in structural assemblies and mechanical equipment. The screw is machined from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection. A 3/4-inch hex drive socket is required for installation. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, confirming its suitability for high-strength applications. Maintenance mechanics, millwrights, and industrial technicians are the primary installers.

This cap screw is used in industrial and commercial settings where a high-strength, large-diameter fastener is required. Common applications include machine frames, heavy equipment assembly, jigs and fixtures, and structural steel fabrication. The partial threading allows the unthreaded shank to act as a precise locating or load-bearing surface, which is valuable in precision-fit assemblies. It is sold in a minimum order quantity of 5 pieces.

Key Features

• 1-8 UNC thread size for heavy-duty, coarse-thread engagement
• 6-1/2 inches length under head for deep-reach fastening
• Partially threaded shank provides a precise locating surface in clearance holes
• 3/4-inch hex socket drive for high-torque installation
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish offers moderate corrosion resistance and low-glare appearance

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw compatible with any application requiring a 1-8 UNC partially threaded fastener with a 3/4-inch drive socket.

Installation Notes

Installation requires a calibrated torque wrench and a 3/4-inch hex socket drive bit rated for the applied torque load. De-energize and lock out all equipment before performing fastener installation or replacement per applicable OSHA lockout/tagout procedures. Inspect the mating threaded hole for damage, debris, or cross-threading before driving the screw. Do not exceed the torque capacity of the drive tool or the rated strength of the fastener.