Value Collection D39412 Hex Head Cap Screw 1/2-20 X 3 in Grade 8

Product Description

The VALUE COLLECTION D39412 is a 1/2-20 UNF hex head cap screw manufactured from Grade 8 steel with a zinc yellow dichromate finish. It measures 3 inches under the head and is partially threaded, conforming to ASME B18.2.1 dimensional standards. Grade 8 steel delivers high tensile strength suitable for demanding fastening applications, while the zinc yellow dichromate coating provides corrosion resistance. This fastener is installed by mechanics, millwrights, and maintenance technicians working on assemblies that require a strong, standardized inch-series fastener.

This screw is suited for industrial, mechanical, and structural fastening applications where a fine-thread 1/2-20 UNF pattern is specified. The partial threading allows for consistent clamping load across thicker joint stacks. Typical uses include equipment assemblies, machinery mounting, and general MRO applications requiring Grade 8 strength and ASME B18.2.1 compliance. Sold individually with a minimum order quantity of 10 pieces.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1/2-20 UNF fine thread provides precise fastening control and vibration resistance
• Zinc yellow dichromate finish offers corrosion protection in moderate service environments
• Partially threaded shank supports accurate clamping in thick-joint assemblies
• Conforms to ASME B18.2.1 for consistent dimensional tolerances
• 3-inch length under head suits a range of mid-depth fastening applications

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application calling for a 1/2-20 UNF Grade 8 fastener conforming to ASME B18.2.1.

Installation Notes

Installation is performed by qualified mechanics or maintenance technicians using a standard hex wrench or socket. Always de-energize and lock out equipment before servicing any assembly. Apply torque per the applicable engineering specification for Grade 8 fasteners at this thread size. Inspect mating threads for damage or contamination before installation.