Starrett 91C Tap Wrench with Tempered Gripping Surfaces (1/4"–5/8" Tap Capacity) | Used, Excellent Condition | USA-Made Precision 12" Body Length Tap Handle
Brand: L.S. Starrett Company
Condition: Used
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Starrett 91C Tap Wrench with Tempered Gripping Surfaces (1/4"–5/8" Tap Capacity) | Used, Excellent Condition | USA-Made Precision 12" Body Length Tap Handle
Achieve smooth, perfectly perpendicular hand tapping with legendary American machinist precision. Add time-tested quality to your shop with this used Starrett 91C Tap Wrench.
When threading precision holes in tool steel, aluminum, or cast iron, cheap tap wrenches flex and slip, leading to crooked threads or snapped taps. The Starrett 91C (EDP 50437) Tap Wrench is engineered for machinists and toolmakers who demand absolute rigidity. Built with case-hardened steel jaws and tempered gripping surfaces, this classic 12-inch body wrench clamps square shanks firmly to eliminate play and ensure straight thread entry.
This item is in excellent, fully functional used condition. Mechanically rock-solid, the adjustable handle threads effortlessly, and the hardened V-jaws align cleanly with crisp edges. It shows typical light cosmetic surface patina, faint scuffs, and minor tool marks from careful bench use—as expected from authentic vintage shop tooling—but zero damage that affects performance. Designed to hold taps from 1/4" to 5/8" (shanks from 5/32" to 3/8"), this USA-made tap handle is built to last a lifetime.
Key Features & Benefits
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Legendary USA Precision: Made in Athol, Massachusetts, by L.S. Starrett Co., the gold standard for precision machinist tooling.
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Tempered Gripping Surfaces: Heat-treated, case-hardened steel jaws hold tap shanks tightly without rounding or slipping under heavy torque.
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12-Inch Body Length: Provides exceptional two-handed leverage and rotational balance to make hand tapping smooth and controlled.
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Versatile Tool Capacity: Holds square shanks from 5/32" to 3/8", accommodating hand taps from 1/4" up to 5/8" ($M6$ to $M16$).
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Knurled Steel Grips: Deeply knurled handle ends ensure maximum hand traction even when working with cutting oils and coolants.
Technical Specifications
| Attribute | Specification |
| Brand | L.S. Starrett Company (Made in USA) |
| Model / Part Number | 91C / EDP 50437 |
| Universal Product Code (UPC) | 049659504378 |
| Condition | Used (Excellent functional state, light cosmetic shop wear) |
| Tool Type | Straight Bar-Type Tap Wrench / Hand Threading Handle |
| Tap Capacity Range | 1/4" to 5/8" (6.3mm to 16mm / $M6$ to $M16$) |
| Square Shank Capacity | 5/32" to 3/8" (4mm to 9.5mm) |
| Overall Length | 12 Inches (305mm) |
| Material Construction | Forged Steel Body with Hardened & Tempered Jaws |
| Handle Style | Dual Straight Arms with Knurled Anti-Slip Grips |
Complete Package Contents
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1x Starrett 91C 12-Inch Tap Wrench (MPN: 91C / EDP 50437)