Value Collection 3108MSL 5/16-18 X 1/2 in Fillister Slotted Screw

Product Description

The Value Collection 3108MSL is a fillister head machine screw designed for general mechanical fastening in metal assemblies, enclosures, and equipment. It features a 5/16-18 unified coarse thread and a 1/2 inch length under head, providing a compact, secure fastening profile in tight clearance applications. The fillister head offers a deeper slot depth than a pan or round head, making it well-suited for slotted drivers where higher torque is needed without head damage. The steel construction with zinc finish provides corrosion resistance in standard indoor and light industrial environments. This screw conforms to ASME B18.6.3 and SAE J82 standards. Licensed tradespeople and maintenance technicians working on equipment panels, junction boxes, and mechanical assemblies commonly install this fastener.

This screw is used in residential and commercial applications wherever a 5/16-18 coarse thread, slotted fillister head fastener is required. Typical uses include securing equipment covers, mounting brackets, and internal components in HVAC units, electrical enclosures, plumbing equipment housings, and general machinery. The zinc finish is appropriate for dry to moderately humid indoor service conditions. Sold individually per package with a minimum order quantity of 100 pieces, making it suitable for stock replenishment and bulk installation work.

Key Features

• 5/16-18 unified coarse thread for strong engagement in standard tapped holes
• Fillister head profile with deep slotted drive for controlled torque application
• 1/2 inch length under head suits shallow clearance fastening applications
• Steel construction with zinc finish for corrosion resistance in indoor environments
• Conforms to ASME B18.6.3 and SAE J82 fastener standards
• No washer — streamlined install in close-clearance or countered applications

Compatibility

Designed as a standard 5/16-18 coarse thread machine screw for use in any tapped hole or threaded insert conforming to unified coarse thread specifications in that size.

Installation Notes

Installation is performed by maintenance technicians, electricians, plumbers, or HVAC service professionals depending on the application. De-energize and lock out equipment before replacing or installing fasteners on or near electrical components. Use a properly sized flat-blade screwdriver matched to the slotted drive to avoid cam-out or slot damage. Do not over-torque — drive until snug and confirm thread engagement without stripping.