Value Collection 99489 Hex Cap Screw 3/8-24 Grade 8 Steel

Product Description

The VALUE COLLECTION 99489 is a partially threaded hex head cap screw sized 3/8-24 x 3-3/4 inches, manufactured from Grade 8 steel with an uncoated finish. Grade 8 steel provides high tensile strength, making this fastener suitable for demanding mechanical and structural assemblies. The UNF (Unified Fine) thread standard delivers precise thread engagement for applications where vibration resistance and tight tolerances matter. Length is measured under the head at 3-3/4 inches. This screw meets ASME B18.2.1 and SAE J429 standards, ensuring dimensional and mechanical compliance for professional installations. It is typically installed by millwrights, maintenance mechanics, equipment technicians, and general tradespeople working on machinery, structural frames, and mechanical assemblies.

This hex head cap screw is suited for general industrial and mechanical fastening applications requiring a fine-thread, high-strength fastener. Partial threading along the shank allows the unthreaded portion to act as a shoulder or shank grip in close-tolerance through-hole applications. Sold in a package quantity of 25, it is appropriate for shop stock, MRO maintenance kits, or job-specific fastener needs across manufacturing, construction, and equipment service environments.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 3/8-24 UNF thread provides fine-pitch engagement and vibration resistance
• Partially threaded shank suits close-tolerance and shear-load applications
• Uncoated finish suitable for use as-is or with additional corrosion protection applied in the field
• Meets ASME B18.2.1 and SAE J429 dimensional and mechanical standards
• Package quantity of 25 supports shop stock and MRO replenishment

Compatibility

Designed as a standard inch-series hex head cap screw compatible with any 3/8-24 UNF threaded hole or nut requiring a Grade 8, partially threaded fastener per ASME B18.2.1 and SAE J429 specifications.

Installation Notes

Install using an appropriate hex socket or open-end wrench sized for a standard 3/8-inch hex head cap screw. Follow SAE J429 Grade 8 torque specifications from a current fastener reference or equipment service manual for the target assembly. De-energize and lock out any equipment before fastener service or replacement. Do not substitute a lower-grade fastener in applications specified for Grade 8.