Value Collection R88444363 Button Head Screw 5/16-18

Product Description

The VALUE COLLECTION R88444363 is a button head machine screw designed for mechanical fastening applications across industrial, HVAC, plumbing, and electrical trade work. Built from 18-8 stainless steel with a bright, uncoated finish, this fastener resists corrosion in both indoor and outdoor service environments. The screw measures 5/16-18 thread size with a 3/4-inch length measured under the head. It uses a pin-in hex socket drive, which requires a compatible tamper-resistant bit for installation. The Unified National Coarse (UNC) thread form ensures broad compatibility with standard threaded holes and nuts in inch-based assemblies.

This fastener suits residential and light commercial applications where corrosion resistance and a low-profile head are required. The button head style sits flush and streamlined against mating surfaces, making it a common choice for equipment panels, access covers, and structural assemblies in HVAC units, electrical enclosures, and plumbing fixtures. Sold in multiples of 5 per order with a package quantity of 1.

Key Features

• 18-8 stainless steel construction for corrosion resistance in wet and outdoor environments
• Button head profile provides a low-profile, clean appearance on finished surfaces
• Pin-in hex socket drive deters unauthorized removal and requires a tamper-resistant bit
• 5/16-18 UNC thread standard ensures compatibility with standard inch-system threaded components
• Bright, uncoated finish maintains dimensional accuracy without coating buildup on threads
• Length measured under head at 3/4 inch for precise fitment in standard applications

Compatibility

Designed as an OEM-style replacement or direct fastener for use in standard 5/16-18 UNC threaded assemblies across HVAC equipment, electrical enclosures, and plumbing hardware.

Installation Notes

Installation should be performed by a qualified tradesperson using a pin-in hex socket bit sized for 5/16-inch fasteners. Always de-energize electrical equipment and shut off fluid supply lines before replacing fasteners on live systems. Do not overtighten stainless steel fasteners, as galling can occur without proper lubrication or anti-seize compound. Follow applicable NEC, IPC, or IFGC guidelines for fastener use in code-regulated assemblies.