Value Collection B7SN1250550UP Threaded Stud Nut 1-1/4-8 B7

Product Description

The VALUE COLLECTION B7SN1250550UP is a fully threaded stud and nut fastener set engineered for demanding industrial and mechanical applications. Each stud measures 1-1/4-8 thread size and 5.5 inches in overall length, manufactured from alloy steel to ASTM A193 Grade B7 specifications. The uncoated finish leaves the steel bare for applications where coatings are undesirable or where the installer will apply their own treatment. This fastener set is commonly installed by millwrights, pipefitters, and maintenance technicians working on bolted flange connections, structural assemblies, and high-load mechanical joints. Each package includes four studs and eight nuts.

Grade B7 fully threaded studs are a standard choice for high-strength bolting in industrial piping systems, pressure vessel flanges, and heavy equipment assemblies. The 1-1/4-8 thread profile follows the Unified National Coarse series and is compatible with 7B class-of-fit nuts. This package of four studs with two nuts per stud is suited for flange bolt-up work on process piping, heat exchangers, and similar bolted joint applications in commercial and industrial facilities.

Key Features

• Grade B7 alloy steel construction for high tensile strength and elevated-temperature service
• 1-1/4-8 UNC thread form with 7B class of fit for controlled engagement tolerance
• 5.5-inch fully threaded length provides maximum thread engagement flexibility
• Uncoated finish suitable for applications requiring bare steel or field-applied coatings
• Package includes four studs and eight nuts for immediate flange bolt-up work

Compatibility

Designed as a general-purpose Grade B7 fully threaded stud for industrial bolted joint applications requiring 1-1/4-8 UNC thread engagement with 7B class-of-fit nuts.

Installation Notes

Installation of Grade B7 threaded studs in pressure piping or vessel applications is typically performed by licensed pipefitters or millwrights in accordance with ASME and applicable facility codes. Shut down and depressurize the system fully before removing or replacing any fasteners in a bolted joint assembly. Inspect threads and mating nut threads for damage before installation. Do not apply excessive torque beyond the values specified in the relevant engineering or maintenance documentation for the joint.