Value Collection 353-2408-01 Button Socket Cap Screw 1/4-28

Product Description

The VALUE COLLECTION 353-2408-01 is a button socket cap screw designed for applications requiring a low-profile head with high clamping strength. Manufactured from alloy steel with a black oxide finish, this fastener measures 1/4-28 UNF thread by 1/2 inch in length under head. The button head profile reduces snag points in tight assemblies, while the Torx Plus IP27 drive delivers higher torque transfer and reduced cam-out compared to hex socket drives. Hardness is rated at 39-44 HRC, meeting ASTM F835 and ANSI/ASME B18.3 standards. It is fully threaded with a Class 3A thread fit and right-hand thread direction. Installers in manufacturing, mechanical assembly, and maintenance operations rely on this fastener where low clearance and a clean finish matter.

This screw is suited for light-to-medium-duty fastening in mechanical assemblies, machine guards, panels, and fixtures where a flush or low-profile head is required. The black oxide coating provides mild corrosion resistance and reduces light reflection, making it a common choice in tooling, jigs, and precision equipment. The 1/4-28 UNF fine thread provides good holding power in metallic tapped holes. This fastener is sold individually but requires a minimum order of 100 pieces per order.

Key Features

• Alloy steel construction rated at 39-44 HRC hardness per ASTM F835
• Torx Plus IP27 (TP27) drive for improved torque transfer and reduced cam-out
• Low-profile button head at 0.046 inches head height minimizes protrusion
• Black oxide finish for mild corrosion resistance and reduced reflectivity
• Fully threaded, Class 3A fit, right-hand UNF thread
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 1/4-28 UNF button socket cap screw for use in any tapped hole or threaded insert accepting a 1/4-28 fine-thread fastener. Confirm mating thread standard before installation.

Installation Notes

Installation requires a Torx Plus IP27 bit driver rated for the torque demands of the application. Verify that the mating tapped hole is clean and free of debris before driving the fastener. Do not exceed the torque capacity of the bit or the holding strength of the base material. Follow applicable machine safety lockout/tagout procedures before servicing assemblies that use this fastener.