Klein 3212 structural spud wrench forged from alloy steel showing the 1-1/4-inch open jaw, 60-degree head offset, and tapered alignment handle.
Infographic detailing key specs for Klein 3212 spud wrench including 1-1/4-inch nominal opening, 60-degree head offset, and non-binding tapered handle.
Close-up of the Klein 3212 spud wrench head detailing stamped 1-1/4-inch opening and 3/4-inch bolt size identification marks.
Gloved ironworker holding the Klein 3212 spud wrench displaying the forged alloy steel head and black oxide surface finish.
Ironworker holding the Klein 3212 spud wrench showing the continuous handle taper designed to slide into bolt holes without binding.
Klein 3212 offset spud wrench engaged on a bolt head demonstrating knuckle clearance along structural wood beam surfaces.
Split view showing an ironworker using the tapered handle to align bolt holes and torquing a structural bolt with the 60-degree offset wrench head.
Size chart comparing Klein spud wrench lengths: 14.75-inch, 16.63-inch (model 3212), 17.38-inch, and 18.00-inch models.
Klein Tools Manufacturing promotional video
Klein 3212 structural spud wrench forged from alloy steel showing the 1-1/4-inch open jaw, 60-degree head offset, and tapered alignment handle.
Infographic detailing key specs for Klein 3212 spud wrench including 1-1/4-inch nominal opening, 60-degree head offset, and non-binding tapered handle.
Close-up of the Klein 3212 spud wrench head detailing stamped 1-1/4-inch opening and 3/4-inch bolt size identification marks.
Gloved ironworker holding the Klein 3212 spud wrench displaying the forged alloy steel head and black oxide surface finish.
Ironworker holding the Klein 3212 spud wrench showing the continuous handle taper designed to slide into bolt holes without binding.
Klein 3212 offset spud wrench engaged on a bolt head demonstrating knuckle clearance along structural wood beam surfaces.
Split view showing an ironworker using the tapered handle to align bolt holes and torquing a structural bolt with the 60-degree offset wrench head.
Size chart comparing Klein spud wrench lengths: 14.75-inch, 16.63-inch (model 3212), 17.38-inch, and 18.00-inch models.
Klein Tools Manufacturing promotional video
KLEIN TOOLS

Klein Tools Spud Wrench 3212 1-1/4 Inch Opening 3/4 Bolt Industrial Construction Alignment Tool (16.625 Length Forged Black Oxide Offset Steel)

In stock
SKU: 3212
$44.99 USD

Description

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Klein Tools 3212 1-1/4-Inch Nominal Opening Structural Connecting Spud Wrench

The Klein Tools 3212 is a heavy-duty industrial spud wrench built with a 1-1/4-inch nominal opening for high-torque fastening of 3/4-inch bolts and U.S. Heavy series nuts during steel frame construction. Precision forged in the USA from heat-treated select alloy steel, this 16.625-inch overall length hand tool incorporates an extra-large hub head to sustain extreme leverage forces without fracturing. A continuous handle taper from 1 inch down to 1/4 inch enables ironworkers to align misaligned bolt holes without wedging, while a 60-degree offset head angle provides maximum hand clearance against structural I-beam flanges and connection plates.

Best Used For:

  • Structural Steel Frame Connecting: Fastening 3/4-inch structural bolts and U.S. Heavy square or hex nuts on steel girders, trusses, and beam joints.
  • Bolt Hole Alignment: Inserting the 16.625-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, bridge erection, and staging frameworks.

Key Performance & Safety Features

  • Forged US Select Alloy Steel: Premium heat-treated steel construction supplies maximum tensile strength under heavy leverage loads.
  • Extra-Large Hub Head Architecture: Reinforced head design provides superior structural integrity during high-torque turning operations.
  • Continuous Non-Binding Taper Handle: Gradual 1-inch to 1/4-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 3212 1-1/4-Inch Nominal Opening Structural Spud Wrench

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 3212
Tool Classification System American Bridge Offset Spud Wrench
Nominal Wrench Opening Size 1.250 inches (1-1/4" / 3.2 cm)
Target Fastener Bolt Size 0.750 inch (3/4" / 1.9 cm)
Fastener Profile Compatibility U.S. Heavy Series Nuts
Head Offset Geometry Angle 60 Degrees Offset
Handle Taper Dimensions 1.000 inch to 0.250 inch (2.5 cm to 0.6 cm)
Overall Tool Length Dimension 16.625 inches (42.2 cm)
Head Width Dimension 2.50 inches (6.4 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 2.0 lbs / 32.0 oz (0.9 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 00092644680083

Pro-Tip: When positioning heavy structural steel members, insert the 1/4-inch tip of the tapered handle through misaligned bolt holes first to lever the plates into position. The 16.625-inch shaft gives ample mechanical leverage to bring holes into alignment before hand-threading 3/4-inch bolts into adjacent openings.