Klein Tools 3251 Bull Pin 15 in Structural Alignment

Product Description

The KLEIN TOOLS 3251 is a structural bull pin used to align holes in steel members during ironwork, structural steel erection, and heavy fabrication. The pin measures 15 inches in length with a top diameter of 1-1/16 inches tapering to a 3/8 inch point. That tapered profile drives into misaligned bolt holes to draw steel plates, flanges, or beam connections into alignment before bolts are set. Ironworkers and structural steel erectors rely on bull pins as a standard hand tool on any bolted connection job. The 3251 weighs 2.45 pounds, giving it the heft needed to seat firmly under mallet strikes without walking out of the hole.

The KLEIN TOOLS 3251 is suited for commercial and industrial structural steel applications including beam connections, column splices, and plate work where bolt-hole alignment is required before final fastening. It is carried as standard issue by ironworkers on bridge work, building frames, and heavy equipment platforms. The tapered shank allows progressive engagement across a range of hole misalignments common in field erection conditions.

Key Features

• 15 inch overall length provides reach and leverage for driving into tight steel connections
• 1-1/16 inch top diameter for firm grip and mallet-strike surface
• 3/8 inch point diameter for entry into standard structural bolt holes
• 2.45 pound weight delivers driving mass without excessive fatigue
• Tapered profile progressively pulls misaligned holes into registration

Compatibility

Designed as a standard ironworker bull pin for use with common structural bolt-hole patterns in steel erection and heavy fabrication work.

Installation Notes

Bull pins are driven with a structural hammer or mallet and should be removed before final bolts are torqued. Always ensure the pin is fully clear of the hole before installing and tightening fasteners. Ironworkers should inspect the pin regularly for deformation at the point or shank, which can indicate overloading. Work in compliance with applicable OSHA structural steel erection standards.

Technical Specifications

• Length: 15 inches
• Top Diameter: 1-1/16 inches
• Point Diameter: 3/8 inches
• Weight: 2.45 pounds
• Unit of Measure: Each
• UPC: 092644666513

Standard Information

• Brand: KLEIN TOOLS
• Manufacturer Part Number: 3251