Klein Tools Standard Bull Pin 3259 1-5/16 Inch Diameter Heat Treated Alloy Steel Alignment Punch (12 Inch Length Forged Black Rust Resistant Finish)

Klein Tools 3259 1-5/16-Inch Body Diameter Heat-Treated Alloy Steel Standard Bull Pin

The Klein Tools 3259 is a 1-5/16-inch (1.313") body diameter standard bull pin engineered for cost-effective structural hole alignment and ironwork construction. Machined and heat-treated from forged alloy steel, this 12.0-inch long, 2.5 lb alignment tool features a gradual 7/16-inch (0.438") point taper designed to smoothly align overlapping bolt holes across structural I-beams, steel plates, and heavy machinery mounts. Finished with a rust-resistant black oxide coating to withstand harsh jobsite weather, this economical erecting punch provides reliable striking strength for heavy ironworkers driving steel joints into concentric alignment.

Best Used For:

• Structural Steel Frame Erection: Aligning misaligned bolt holes on structural steel I-beam connections and heavy gusset plates prior to installing structural fasteners.
• Bridge & Highway Ironwork: Driving through thick multi-layered steel plates to quickly center connection points on heavy bridge structures.
• Heavy Equipment Maintenance: Centering structural mounting brackets and heavy machinery pin holes during field maintenance and assembly.

Key Performance & Safety Features

• Forged Alloy Steel Construction: Precision machined and heat-treated metallurgy ensures dependable tensile strength for high-impact driving applications.
• Smooth Gradual Point Taper: Uniform transition from the 7/16-inch point to the 1-5/16-inch body diameter minimizes binding and hang-up during insertion and removal.
• Cost-Effective Standard Geometry: Classic straight-shoulder design offers maximum economic value for essential jobsite hole alignment needs.
• Black Oxide Protective Surface: Rust-resistant finish guards the heat-treated steel body against atmospheric corrosion and moisture.
• Balanced Striking Leverage: Full 12.0-inch total length and 2.5 lb weight deliver effective momentum transfer under sledgehammer strikes.

What's Included

• (1) Klein Tools 3259 1-5/16-Inch Standard Bull Pin

Technical Specifications

Pro-Tip: Standard bull pins lack broad-head mushrooming protection, so periodically inspect the striking head for burrs or deformation. Grind down any small burrs or mushroomed edges early using a hand grinder to maintain safe striking conditions and extend tool life.