Value Collection 49135 Hex Head Bolt 1-8 Unc Alloy Steel B7

Product Description

The VALUE COLLECTION 49135 is a Grade B7 alloy steel hex head bolt designed for high-strength fastening applications in industrial, mechanical, and trade environments. It carries a 1-8 UNC thread and measures 3-1/2 inches in length under the head. Manufactured to ASTM A193 standards, it delivers the tensile strength and material consistency required in pressure vessels, flanges, piping assemblies, and structural connections. The bright uncoated finish leaves the base alloy steel exposed, making it suitable for applications where additional coatings or platings will be applied on-site or where bare steel is specified. Sold in a pack of 5.

This bolt is used in commercial and industrial piping, valve assemblies, flange bolting, and heavy mechanical fabrication. ASTM A193 Grade B7 fasteners are a standard specification in HVAC mechanical rooms, boiler rooms, and industrial process piping where elevated temperature service and high clamping loads are common. Plumbers, pipefitters, millwrights, and mechanical contractors working on pressure-rated systems regularly specify this grade. The UNC thread form is the most common inch-series coarse thread standard in North American trade work.

Key Features

• Grade B7 alloy steel construction meets ASTM A193 fastener standard for high-strength bolting
• 1-8 UNC thread provides maximum engagement in standard coarse-thread nuts and tapped holes
• 3-1/2 inch length under head covers a wide range of flange and structural stack-up thicknesses
• Bright uncoated finish — no coating to interfere with field plating or torque-tension relationships
• Hex head drive works with standard open-end, box-end, and socket wrenches
• Pack of 5 units reduces per-fastener cost on multi-bolt flange or equipment installations

Compatibility

Designed as an OEM-style replacement and general-purpose fastener for applications requiring ASTM A193 Grade B7 hex head bolts in 1-8 UNC thread, 3-1/2 inch length under head.

Installation Notes

Installation is performed by licensed pipefitters, millwrights, or mechanical contractors working under applicable mechanical and pressure-piping codes. Depressurize, de-energize, and isolate any system before replacing fasteners on flanges or pressure-containing equipment. Use calibrated torque tooling rated for the bolt size and consult the applicable flange standard or equipment manufacturer specification for torque values. Alloy steel fasteners should be inspected for thread condition before installation and replaced if any damage is present.