Value Collection 243508 Flat Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 243508 is a flat socket cap screw designed for flush or countersunk fastening applications where a smooth, low-profile surface finish is required. Manufactured from 18-8 stainless steel, this screw offers solid corrosion resistance suitable for general industrial, marine-adjacent, and food-service-adjacent environments. The 82-degree flat head seats flush with the mating surface when installed in a properly countersunk hole. Drive engagement is via a 3/8-inch hex socket. Thread size is 5/16-18 UNC with an overall length of 1.5 inches. This fastener is handled by machinists, millwrights, maintenance technicians, and mechanical contractors working with inch-standard hardware.

The 243508 is suited for applications requiring a countersunk fastener in ferrous and non-ferrous assemblies, equipment frames, brackets, panels, and fixtures where thread size 5/16-18 UNC is specified. The 18-8 stainless steel construction makes it a practical choice in mildly corrosive or wet environments. This item is sold individually but carries a minimum order quantity of 100 pieces, making it appropriate for stocking, kitting, or production assembly use.

Key Features

• 82-degree flat head profile for flush countersunk installation
• 3/8-inch hex socket drive for reliable torque transfer
• 18-8 stainless steel construction for corrosion resistance
• 5/16-18 UNC thread standard — inch-system compatible
• 1.5-inch overall length for moderate-depth fastening applications
• Minimum order quantity of 100 pieces — suitable for production and stocking use

Compatibility

Designed as a standard inch-system flat socket cap screw for use in any application specifying a 5/16-18 UNC thread, 82-degree countersunk flat head, and 1.5-inch overall length in 18-8 stainless steel.

Installation Notes

Installation requires a countersunk hole machined to an 82-degree included angle to achieve a proper flush seat. Use a correctly sized hex key or socket driver — a 3/8-inch hex drive is required. Apply appropriate torque per the assembly specification for 5/16-18 stainless steel fasteners; avoid overtorquing, which can gall stainless threads. Anti-seize compound is recommended when mating stainless fasteners to stainless tapped holes to prevent galling.