Value Collection 354-0408-01 Flat Socket Cap Screw 1/4-20

Product Description

The VALUE COLLECTION 354-0408-01 is a flat socket cap screw engineered for flush or countersunk fastening applications in metal and structural assemblies. It features a 1/4-20 UNC thread in a 1/2-inch overall length, fully threaded from head to tip. The 82-degree flat head profile seats flush with the work surface when installed in a properly countersunk hole. Drive is Torx Plus T30, which provides higher torque transfer and reduced cam-out compared to standard hex socket drives. Base material is alloy steel with a black oxide finish that offers mild corrosion resistance and a low-glare appearance. This fastener meets ASME/ANSI B18.3 and ASTM F835 standards. Machinists, millwrights, and maintenance technicians install this type of screw in equipment frames, fixtures, and assemblies where a flush surface is required.

This flat socket cap screw is suited for general industrial, mechanical, and fabrication applications where a countersunk, flush-mount fastener is needed. The fully threaded shank makes it appropriate for thin material applications and through-bolted connections where thread engagement along the full length is beneficial. The black oxide finish is common in interior or low-moisture environments. The Torx Plus T30 drive requires a matching bit or driver, which is standard tooling in most industrial and maintenance settings.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• Torx Plus T30 drive for improved torque transmission and reduced cam-out
• Fully threaded 1/4-20 UNC shank over the full 1/2-inch length
• Alloy steel construction for high tensile and shear strength
• Black oxide finish for a low-glare, mildly corrosion-resistant surface
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style or general-purpose replacement flat socket cap screw for applications requiring a 1/4-20 UNC, 1/2-inch overall length, 82-degree countersunk head fastener with a Torx Plus T30 drive.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a Torx Plus T30 driver or bit. The mating hole must be countersunk to an 82-degree included angle for proper head seating. Power down or de-energize any equipment before fastener replacement on live assemblies. Do not substitute a standard hex key in the Torx Plus socket, as this will damage the drive recess.