Value Collection R57001172 Hex Head Cap Screw 1/2-20

Product Description

The VALUE COLLECTION R57001172 is a fully threaded hex head cap screw designed for general fastening applications requiring corrosion resistance and dimensional precision. Sized at 1/2-20 UNF x 1-3/4 inches under the head, this fastener is manufactured from 18-8 stainless steel with a bright, uncoated finish. The unified fine thread (UNF) pitch provides stronger thread engagement compared to coarse-thread equivalents, making it well suited for vibration-prone or close-tolerance assemblies. Electricians, plumbers, HVAC technicians, and general mechanical contractors regularly use stainless hex cap screws for equipment mounting, panel attachment, and structural connections where rust resistance is required.

This fastener is appropriate for indoor and outdoor installations where exposure to moisture, mild chemicals, or corrosive environments is a concern. Common applications include mechanical room equipment anchorage, HVAC unit mounting hardware, pump and valve bracket fastening, and electrical enclosure assembly. The 1/2-20 UNF thread size is a standard inch-series fine thread, compatible with 1/2-inch UNF tapped holes and standard 1/2-inch hex nuts and washers. This screw is sold individually, with a minimum order quantity of 10 units.

Key Features

• Fully threaded shank — thread runs the full 1-3/4 inches under the head for maximum engagement flexibility
• 18-8 stainless steel construction provides corrosion resistance in wet and mildly corrosive environments
• 1/2-20 UNF thread standard — fine pitch for stronger thread engagement and reduced loosening under vibration
• Bright, uncoated finish — no plating to chip, flake, or affect dimensional tolerances
• Inch system dimensions — direct replacement or addition to existing inch-standard hardware sets

Compatibility

Designed for use with standard 1/2-inch UNF tapped holes, hex nuts, and flat or lock washers in inch-series fastener applications across HVAC, plumbing, electrical, and general mechanical installations.

Installation Notes

Install using a standard hex wrench or socket sized for a 1/2-inch hex cap screw head. Shut down and de-energize equipment before fastening or removing hardware on electrical or mechanical systems. When installing stainless steel fasteners into stainless tapped holes, apply an anti-seize compound to prevent galling. Follow applicable codes and equipment manufacturer torque guidance for structural connections.