Value Collection 209843 Hex Head Cap Screw 1/2-20 Unf

Product Description

The VALUE COLLECTION 209843 is a hex head cap screw designed for threaded fastening applications requiring corrosion-resistant hardware. Manufactured from 18-8 stainless steel, this fastener features a 1/2-20 UNF (Unified National Fine) thread and a length under head of 1-1/4 inches. The 3/4-inch hex drive accepts standard hex wrenches and sockets for reliable installation torque. Its fine-thread pitch provides stronger thread engagement and better resistance to loosening under vibration compared to coarse-thread equivalents. This screw is suited for maintenance, fabrication, and equipment assembly work across HVAC, plumbing, electrical, and general mechanical trades.

This fastener is used in applications where stainless steel is specified for its corrosion resistance — including outdoor equipment mounting, wet environments, pool and spa mechanical assemblies, and coastal installations. The 1/2-20 UNF thread is a standard inch-series fine thread, compatible with matching UNF nuts and tapped holes. This item is sold individually, with a minimum order quantity of 50 pieces, making it appropriate for shop stock, service van inventory, or project-specific procurement.

Key Features

• 18-8 stainless steel construction resists rust and corrosion in wet or outdoor environments
• 1/2-20 UNF fine-thread pitch for strong thread engagement and vibration resistance
• 1-1/4 inch length under head for standard fastening depth requirements
• 3/4 inch hex drive compatible with common wrenches and sockets
• Inch measurement system, UNF thread standard

Compatibility

Designed as a standard inch-series UNF hex head cap screw for use in any application requiring a 1/2-20 threaded fastener in 18-8 stainless steel.

Installation Notes

Install using a 3/4-inch open-end wrench, box wrench, or socket. Ensure the mating nut or tapped hole is also a 1/2-20 UNF thread before installation. In stainless steel fastener applications, apply an anti-seize compound to the threads to prevent galling during tightening. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the specific assembly.