Value Collection 015219PR Hex Socket Cap Screw 5/16-18 Unc

Product Description

The VALUE COLLECTION 015219PR is a hex socket cap screw designed for fastening applications that require a recessed drive and a clean, low-profile head. The screw features a 5/16-18 UNC thread size with a 3-inch length under the head and is partially threaded, which helps align mating parts before full engagement. The 1/4-inch hex (Allen) drive allows precise torque application in confined spaces. Constructed from alloy steel with a black oxide finish, it delivers solid mechanical strength with moderate corrosion resistance for indoor and protected environments. Licensed tradespeople and maintenance technicians across mechanical, HVAC, and industrial service work regularly use this fastener type.

This cap screw suits a wide range of mechanical assembly and equipment installation scenarios, including structural bracketing, equipment panel mounting, and component fastening in light industrial and commercial settings. Partially threaded shanks are common in applications where a smooth, unthreaded grip length is needed to prevent thread engagement through the full joint. The black oxide coating reduces surface friction and provides basic rust inhibition in dry or low-moisture conditions.

Key Features

• 5/16-18 UNC thread size for standard fractional fastening applications
• 3-inch length under head with partial threading for grip-length joint control
• 1/4-inch hex drive for use with standard Allen keys and hex bit sockets
• Alloy steel construction meets ASME/ANSI B18.3, ASTM A574, and IFI 124 standards
• Black oxide finish provides moderate corrosion resistance and reduced galling

Compatibility

Designed as a standard 5/16-18 UNC hex socket cap screw conforming to ASME/ANSI B18.3, making it compatible with any tapped hole or threaded insert machined to that specification.

Installation Notes

Installation requires a 1/4-inch hex key or Allen bit driver. Always verify the receiving thread is clean and free of debris before driving. Apply torque values appropriate for Grade 8 or equivalent alloy steel fasteners per the applicable mechanical or structural specification. Do not use in continuous high-moisture or outdoor environments without additional corrosion protection beyond the black oxide coating.