Klein 3220 structural spud wrench forged from alloy steel showing the 13/16-inch open jaw, 60-degree head offset, and tapered alignment handle.
Infographic detailing key specs for Klein 3220 spud wrench including 13/16-inch nominal opening, 60-degree head offset, and non-binding tapered handle.
Close-up of the Klein 3220 spud wrench head detailing stamped 13/16-inch opening and 1/2-inch bolt size identification marks.
Gloved ironworker holding the Klein 3220 spud wrench displaying the forged alloy steel head and black oxide surface finish.
Ironworker holding the Klein 3220 spud wrench showing the continuous handle taper designed to slide into bolt holes without binding.
Klein 3220 offset spud wrench engaged on a bolt head demonstrating knuckle clearance along structural wood beam surfaces.
Size chart comparing Klein spud wrench lengths: 14.75-inch (model 3220), 16.63-inch, 17.38-inch, and 18.00-inch models.
Work@Height Tools promotional video
Klein 3220 structural spud wrench forged from alloy steel showing the 13/16-inch open jaw, 60-degree head offset, and tapered alignment handle.
Infographic detailing key specs for Klein 3220 spud wrench including 13/16-inch nominal opening, 60-degree head offset, and non-binding tapered handle.
Close-up of the Klein 3220 spud wrench head detailing stamped 13/16-inch opening and 1/2-inch bolt size identification marks.
Gloved ironworker holding the Klein 3220 spud wrench displaying the forged alloy steel head and black oxide surface finish.
Ironworker holding the Klein 3220 spud wrench showing the continuous handle taper designed to slide into bolt holes without binding.
Klein 3220 offset spud wrench engaged on a bolt head demonstrating knuckle clearance along structural wood beam surfaces.
Size chart comparing Klein spud wrench lengths: 14.75-inch (model 3220), 16.63-inch, 17.38-inch, and 18.00-inch models.
Work@Height Tools promotional video
KLEIN TOOLS

Klein Tools Spud Wrench 3220 13/16 Inch Opening 1/2 Bolt Industrial Construction Alignment Tool (14.75 Length Forged Black Oxide Offset Steel)

Only 2 left
SKU: 3220
$38.99 USD

Description

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Klein Tools 3220 13/16-Inch Nominal Opening Structural Connecting Spud Wrench

The Klein Tools 3220 is an industrial structural spud wrench engineered with a 13/16-inch nominal opening for high-torque tightening of 1/2-inch bolts and U.S. Regular series nuts during steel frame assembly. Precision forged in the USA from heat-treated select alloy steel, this 14.75-inch overall length hand tool incorporates an extra-large hub head to sustain heavy leverage forces without fracturing. A continuous handle taper from 7/8 inch down to 3/16 inch enables ironworkers to align misaligned bolt holes without wedging, while a 60-degree offset head angle delivers ample hand clearance against structural I-beam flanges and connection plates.

Best Used For:

  • Structural Steel Connecting: Fastening 1/2-inch structural bolts and U.S. Regular square or hex nuts on steel girders, trusses, and beam joints.
  • Bolt Hole Alignment: Inserting the 14.75-inch continuously tapered handle into overlapping steel plate openings to pry members into concentric alignment.
  • Heavy Industrial Frame Assembly: Torquing structural fasteners across commercial building construction, tower erection, and staging frameworks.

Key Performance & Safety Features

  • Forged US Select Alloy Steel: High-grade heat-treated alloy steel construction delivers maximum tensile strength under heavy leverage loads.
  • Extra-Large Hub Head Architecture: Reinforced head engineering provides superior structural integrity during high-torque turning operations.
  • Continuous Non-Binding Taper Handle: Gradual 7/8-inch to 3/16-inch handle taper slides smoothly into misaligned bolt holes to align multi-layer plates.
  • 60-Degree Offset Head Angle: Deep angle offset keeps hands and knuckles clear of beam flanges and obstruction plates.
  • Black Oxide Protective Surface: Corrosion-resistant coating with rust-preventative finish guards against jobsite moisture and chemical exposure.
  • Stamped Forging Identifiers: Stamped part number, bolt size, and opening dimensions provide quick on-site tool verification.

What's Included

  • (1) Klein Tools 3220 13/16-Inch Nominal Opening Structural Spud Wrench

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 3220
Tool Classification System American Bridge Offset Spud Wrench
Nominal Wrench Opening Size 0.813 inch (13/16" / 2.1 cm)
Target Fastener Bolt Size 0.500 inch (1/2" / 1.3 cm)
Fastener Profile Compatibility U.S. Regular Square & Hex Nuts
Head Offset Geometry Angle 60 Degrees Offset
Handle Taper Dimensions 0.875 inch to 0.188 inch (2.2 cm to 0.5 cm)
Overall Tool Length Dimension 14.75 inches (37.5 cm)
Head Width Dimension 2.25 inches (5.7 cm)
Overall Tool Height Dimension 1.00 inch (2.5 cm)
Core Metallurgy Material Forged Select US Alloy Steel
Protective Surface Finish Black Oxide with Rust Preventative Treatment
Assembled Net Tool Weight 1.4 lbs / 22.4 oz (0.6 kg)
High-Voltage Insulated Frame No (Uninsulated - do not use on energized electrical circuits)
Country of Origin Made in the USA
Global Trade Item Number GTIN 00092644680151

Pro-Tip: When positioning structural steel beams, push the 3/16-inch end of the tapered handle all the way through overlapping plate holes until the shaft fills the gap, then pull down on the 14.75-inch handle to leverage the holes into concentric alignment before threading your 1/2-inch bolt into an adjacent hole.