Value Collection 49131 Hex Head Cap Screw B7 Steel Astm A193

Product Description

The VALUE COLLECTION 49131 is a hex head cap screw sized 1-8 x 2-1/4 inches, manufactured from Grade B7 alloy steel with a bright, uncoated finish. It meets ASTM A193 standards, which specify high-strength fasteners used in pressure vessels, valves, flanges, and fittings. The thread standard is UNC (Unified National Coarse), and the length measurement is taken from under the head. This fastener is used by pipefitters, millwrights, plumbers, and mechanical contractors in bolted flange assemblies and structural connections where elevated strength requirements apply.

This screw is suited for industrial and commercial applications requiring ASTM A193 compliance. Grade B7 fasteners are commonly specified in high-pressure and high-temperature piping systems, heat exchangers, and pressure vessel assemblies. The uncoated finish is typical where base material strength is the primary requirement and no additional corrosion protection is specified by the application. Package quantity is 5 pieces per order.

Key Features

• Grade B7 alloy steel construction meets ASTM A193 specification for high-strength bolting
• UNC thread standard for broad compatibility with standard inch-series nuts and tapped holes
• Bright, uncoated finish — no additional coating that could affect dimensional tolerances
• Length measured from under the head: 2-1/4 inches
• Thread size 1-8 for large-diameter bolted connections
• Sold in packs of 5 pieces

Compatibility

Designed as an ASTM A193 Grade B7 compliant hex head cap screw for use in standard inch-series UNC bolted assemblies in industrial piping, pressure vessel, and mechanical applications.

Installation Notes

Installation should be performed by qualified pipefitters, millwrights, or mechanical technicians familiar with ASTM A193 bolting requirements. Always power down or depressurize the system before disassembling or assembling bolted flange connections. Follow applicable codes such as ASME B31.3 or relevant piping and pressure vessel standards for torque sequencing and assembly procedures. Use appropriate calibrated tooling; do not substitute with undersized wrenches that may round the hex head.