Value Collection R88444309 Button Head Machine Screw 5/16-18

Product Description

The VALUE COLLECTION R88444309 is a 5/16-18 x 1-inch button head machine screw made from 18-8 stainless steel with a bright, uncoated finish. It uses a pin-in hex socket drive, also known as a pin-in Torx or security hex, which resists unauthorized removal and is common in industrial and commercial fastener applications. The UNC (Unified National Coarse) thread form provides reliable thread engagement in standard tapped holes. Length is measured under the head. This fastener is sold individually but must be ordered in multiples of five.

This screw suits applications where corrosion resistance is required, such as outdoor enclosures, marine hardware, food-processing equipment, pool equipment panels, and HVAC unit assemblies. The button head profile provides a low-profile, tamper-resistant appearance suitable for exposed fastener locations. Electricians, HVAC technicians, and plumbers commonly use this style when assembling or securing panels, brackets, and enclosures where a flush or low-profile head is preferred over a pan or hex cap style.

Key Features

• 18-8 stainless steel construction resists rust and corrosion in wet or outdoor environments
• Button head profile offers a low-profile, finished appearance for exposed fastener locations
• Pin-in hex socket drive discourages unauthorized removal
• UNC thread standard for compatibility with standard inch-threaded tapped holes
• Bright, uncoated finish preserves natural stainless appearance
• Length measured under the head per standard fastener convention

Compatibility

Designed as a standard UNC inch-series machine screw suitable for use in any tapped or clearance hole application calling for a 5/16-18 thread pitch button head fastener in stainless steel.

Installation Notes

Install and remove with a pin-in hex socket driver of the appropriate size to avoid stripping the drive recess. Torque to the specification listed in the equipment service manual or applicable fastener standard for 5/16-18 stainless steel hardware. Verify thread engagement depth meets the requirements of the assembly before final torque. Do not mix stainless steel fasteners with dissimilar metals in high-moisture environments without accounting for galvanic corrosion potential.