Value Collection 1428MST 1/4-20 Truss Head Machine Screw

Product Description

The VALUE COLLECTION 1428MST is a 1/4-20 truss head machine screw designed for general-purpose fastening in metal, wood, and composite assemblies. The broad, low-profile truss head distributes clamping load over a wider bearing surface compared to a standard round or pan head, making it well suited for thin-gauge material and sheet metal work. Constructed from steel with a zinc finish, this screw meets ASME B18.6.3 and SAE J82 standards. The slotted drive accepts a standard flat-blade screwdriver. Length is measured under the head at 1-3/4 inches on a 1/4-20 unified coarse thread.

This screw is used across a broad range of trade and light industrial applications including HVAC equipment assembly, electrical enclosure fabrication, plumbing fixture mounting, and general mechanical assembly. The zinc finish provides a baseline level of corrosion resistance suitable for dry or mildly humid indoor environments. Truss head geometry is commonly specified where a countersunk or hex head is not appropriate and a wider bearing footprint is required. Sold in multiples of 100.

Key Features

• Truss head profile provides wide, low-profile bearing surface for thin-material fastening
• 1/4-20 unified coarse thread for broad tool and hardware compatibility
• 1-3/4 inch length under head for moderate-depth fastening applications
• Zinc finish for corrosion resistance in dry indoor environments
• Slotted drive accepts standard flat-blade screwdrivers
• Meets ASME B18.6.3 and SAE J82 fastener standards

Compatibility

Designed as an OEM-style replacement or general-use machine screw compatible with any 1/4-20 threaded hole or nut in residential and light commercial mechanical assemblies.

Installation Notes

Installation requires a flat-blade screwdriver sized to the slot width of a 1/4-20 truss head fastener. Ensure the mating threads or nut is clean and free of debris before driving. Do not overtorque slotted fasteners, as the drive is more susceptible to cam-out than hex or Torx drive styles. Follow applicable mechanical codes and equipment manufacturer torque requirements for the specific assembly.