Value Collection 353-0508-01 Button Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 353-0508-01 is a button socket cap screw designed for fastening applications that require a low-profile head and high tensile strength. Made from alloy steel with a black oxide finish, this screw measures 5/16-18 thread size with a 1/2 inch length under head. It is driven by a Torx Plus IP40 drive, which provides improved torque transfer and reduced cam-out compared to standard hex drives. Hardness is rated at 39 to 44 HRC per ASTM F835. Thread fit is Class 3A right-hand UNRC. Installers in mechanical assembly, equipment manufacturing, and maintenance applications will find this fastener suited to precision fitment requirements.

This button socket cap screw is used in general industrial and mechanical assembly work where clearance is limited and a standard hex socket head would protrude too far. The low-profile button head reduces interference in close-tolerance assemblies. Common applications include machinery enclosures, brackets, fixtures, and structural panels. The black oxide coating provides mild corrosion resistance and a dark, non-reflective appearance suited to indoor environments. Minimum order quantity is 100 pieces; each package contains 1 piece.

Key Features

• Torx Plus IP40 drive for high torque transfer and reduced cam-out
• Alloy steel construction with 39 to 44 HRC hardness rating
• Black oxide coating for mild corrosion resistance and low reflectivity
• 5/16-18 UNRC Class 3A right-hand thread for precise fit
• Low-profile button head at 0.166 inches head height for clearance-sensitive assemblies
• Meets ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-fit fastener for industrial and mechanical assemblies requiring a 5/16-18 button socket cap screw with Torx Plus drive.

Installation Notes

Installation should be performed by a qualified mechanic or assembler using a calibrated Torx Plus IP40 driver or bit. Verify mating thread condition and clean threads before installation. Follow applicable torque guidelines from the equipment manufacturer or relevant ASME standards for alloy steel fasteners in the 5/16-18 size class. Do not substitute a standard Torx driver for the Torx Plus drive, as this may damage the drive recess.