Value Collection 3124MST 5/16-18 Truss Head Slotted Machine Screw

Product Description

The VALUE COLLECTION 3124MST is a slotted truss head machine screw designed for general-purpose fastening in metal, wood, and composite assemblies. It features a 5/16-18 unified coarse thread and measures 1.5 inches under the head. The low-profile truss head provides a wide bearing surface, distributing clamping load across a larger area than a standard pan or round head. Manufactured from steel with a zinc finish for corrosion resistance, this screw meets ASME B18.6.3 and SAE J82 standards. It is suited for production assembly, MRO maintenance work, and structural panel fastening where a flush or low-profile fastener is required.

This screw is used in light to medium-duty fastening applications across industrial maintenance, equipment assembly, and general construction. The truss head profile is commonly specified where clearance above the fastened surface is limited or where a wider bearing surface is needed to prevent pull-through in softer substrates. The slotted drive is compatible with standard flat-blade screwdrivers and slotted bits, making it accessible in field and shop environments alike. It is sold in multiples of 100 pieces per order, packaged as a single unit.

Key Features

• 5/16-18 unified coarse thread for reliable engagement in standard tapped holes
• Truss head profile provides a wide, low-profile bearing surface
• Slotted drive compatible with flat-blade screwdrivers and slotted power bits
• Steel construction with zinc finish for basic corrosion protection
• Meets ASME B18.6.3 and SAE J82 fastener standards
• 1.5-inch length under head suits medium-depth fastening applications

Compatibility

Designed as a standard replacement or production fastener for any application requiring a 5/16-18 x 1.5-inch slotted truss head machine screw to ASME B18.6.3 specification.

Installation Notes

Install with a flat-blade screwdriver or slotted bit sized to the screw slot to avoid cam-out and head damage. Ensure the mating tapped hole or nut is clean and properly threaded to 5/16-18 UNC before driving. Do not overtorque — stop when the head seats firmly against the bearing surface. Power down or de-energize any equipment before fastening or removing screws on electrical or mechanical assemblies.