Value Collection A997503 Hex Socket Cap Screw 5/16-18 Unc

Product Description

The VALUE COLLECTION A997503 is a hex socket cap screw designed for fastening applications that require a clean, recessed drive and reliable clamping force. This screw features a 5/16-18 UNC thread size and measures 4 inches in length under the head. Drive engagement is through a 1/4-inch hex socket. Manufactured from 18-8 stainless steel, this fastener offers corrosion resistance suitable for both indoor and outdoor environments. It is installed using a standard hex key or Allen-style driver bit and is sold in a pack of 10.

This fastener is commonly used in mechanical assemblies, equipment fabrication, and maintenance applications across HVAC, plumbing, electrical enclosure work, and general industrial trades. The 5/16-18 UNC coarse thread pattern is widely compatible with standard tapped holes and threaded inserts found in light structural and equipment-mounting applications. The 4-inch under-head length accommodates thicker material stacks or applications requiring deeper thread engagement.

Key Features

• 5/16-18 UNC coarse thread for broad compatibility with standard tapped holes
• 4-inch length under head for deeper engagement in thicker assemblies
• 1/4-inch hex socket drive for recessed installation with a standard hex key
• 18-8 stainless steel construction provides corrosion resistance in wet or outdoor environments
• Pack of 10 units per order

Compatibility

Designed as an OEM-style replacement or stock fastener for any application requiring a 5/16-18 UNC hex socket cap screw with a 4-inch under-head length in stainless steel.

Installation Notes

Install using a 1/4-inch hex key or a matching Allen-style driver bit. Ensure the mating tapped hole is clean and free of debris before driving. Do not overtighten, as stainless steel fasteners are susceptible to galling without proper lubrication. Apply an appropriate anti-seize compound when installing into stainless or aluminum threads to prevent thread seizure.