Value Collection R52001113 Step Bolt 5/16-18 Unc

Product Description

The VALUE COLLECTION R52001113 is a 5/16-18 UNC step bolt designed for structural and mechanical fastening applications where a large, flat bearing head is required. The bolt measures 3/4 inches in length under the head with a head diameter ranging from 1.0000 to 1.0310 inches. Manufactured from 1006-1050 carbon steel with a zinc-plated finish, it resists corrosion in typical indoor and light industrial environments. This fastener conforms to ANSI/ASME B18.5 standards, making it a reliable choice for engineers, maintenance technicians, and trade professionals who specify to standard dimensions.

Step bolts are commonly used in steel construction, conveyor systems, and equipment mounting where a wide, low-profile head is needed to spread clamping load across a broad surface. This 5/16-18 size is suited for light-to-medium duty assemblies in residential, commercial, and industrial settings. The UNC thread form is compatible with standard inch-series nuts and tapped holes. Installation is straightforward for millwrights, ironworkers, electricians, and general maintenance trades working with standard inch hardware.

Key Features

• Conforms to ANSI/ASME B18.5 step bolt standard for consistent dimensional tolerances
• 1006-1050 carbon steel construction for reliable tensile strength in general-duty applications
• Zinc-plated finish provides corrosion resistance in dry and mildly humid environments
• Large head diameter (1.0000 to 1.0310 inches) distributes clamping load over a wider bearing surface
• UNC thread form ensures compatibility with standard inch-series fastener hardware
• Weighs approximately 0.034 pounds per unit, suitable for weight-sensitive assemblies

Compatibility

Designed as a standard ANSI/ASME B18.5 step bolt for use with 5/16-18 UNC inch-series nuts and tapped components in general mechanical and structural fastening applications.

Installation Notes

Step bolts should be installed by qualified tradespeople following applicable fastener torque guidelines for the 5/16-18 thread class and joint material. Always verify mating hole diameter and thread engagement before final assembly. Zinc-plated fasteners are not recommended for prolonged submersion or highly corrosive environments without additional protective measures. Hand-tighten before applying final torque to avoid cross-threading.