Klein Tools D50512BS 12-inch quick-adjust pump pliers with open straight jaws and orange plastic-dipped handles for heavy plumbing pipe work.
Feature breakdown diagram highlighting the straight jaw design and all-steel forged body construction of Klein Tools D50512BS pump pliers.
Close-up of heat-treated straight jaws on Klein pump pliers showing directional teeth engineered for reduced wear and positive pipe gripping.
Detail of the quick-adjust push button on Klein D50512BS pliers showing 18 adjustable jaw positions for precise one-handed sizing.
Detail of the quick-adjust push button on Klein D50512BS pliers showing 18 adjustable jaw positions for precise one-handed sizing.
Klein Tools D50512BS pliers gripping a rusted pipe coupling demonstrating multi-grip versatility on square, round, hex, and flat stock.
Klein Tools pump pliers comparison guide showing D505XXBS models include straight jaws, quick-adjust button, dipped grips, and 7, 10, and 12 inch sizes.
Klein Tools D50512BS 12-inch alloy steel pump pliers in black oxide finish with quick-adjust pivot button and orange plastic-dipped handles.
The Name on the Tools is Our Reputation promotional how to video
Klein Tools D50512BS 12-inch quick-adjust pump pliers with open straight jaws and orange plastic-dipped handles for heavy plumbing pipe work.
Feature breakdown diagram highlighting the straight jaw design and all-steel forged body construction of Klein Tools D50512BS pump pliers.
Close-up of heat-treated straight jaws on Klein pump pliers showing directional teeth engineered for reduced wear and positive pipe gripping.
Detail of the quick-adjust push button on Klein D50512BS pliers showing 18 adjustable jaw positions for precise one-handed sizing.
Detail of the quick-adjust push button on Klein D50512BS pliers showing 18 adjustable jaw positions for precise one-handed sizing.
Klein Tools D50512BS pliers gripping a rusted pipe coupling demonstrating multi-grip versatility on square, round, hex, and flat stock.
Klein Tools pump pliers comparison guide showing D505XXBS models include straight jaws, quick-adjust button, dipped grips, and 7, 10, and 12 inch sizes.
Klein Tools D50512BS 12-inch alloy steel pump pliers in black oxide finish with quick-adjust pivot button and orange plastic-dipped handles.
The Name on the Tools is Our Reputation promotional how to video
KLEIN TOOLS

Klein Pump Pliers D50512BS 12 Inch Straight Jaw Quick Adjust (2.87 Inch Jaw Capacity 18 Position Alloy Steel Black Oxide Dipped Handles)

Only 2 left
SKU: D50512BS
$32.99 USD

Description

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Klein Tools D50512BS 12-Inch Straight Jaw Quick-Adjust Pump Pliers

The Klein Tools D50512BS 12-Inch Straight Jaw Quick-Adjust Pump Pliers is a high-leverage mechanical gripping tool featuring a 2.87-inch jaw capacity across 18 locking positions. Forged from high-tensile alloy steel with a black oxide coating, this 1.04 lb plumbing tool utilizes a push-button quick-adjust pivot joint and directional hardened teeth to secure large pipe fittings, conduit couplings, and hex nuts without slipping under load.

Best Used For:

  • Large-Diameter Pipe Fitting: Gripping threaded iron, PVC, and steel pipes up to 2.87 inches in diameter during commercial plumbing installations.
  • Industrial Machinery Servicing: Applying high rotational torque to large hex nuts and rusted couplings in narrow mechanical enclosures.
  • Conduit Coupling Tightening: Turning heavy-wall rigid electrical conduit fittings and locknuts securely without slipping or stripping hardware.

Key Performance & Safety Features

  • Push-Button Quick-Adjust Joint: 18-position locking mechanism allows rapid, one-handed jaw sizing to fit varying pipe and hardware dimensions.
  • Straight Jaws with Directional Teeth: Hardened tooth profile provides multiple contact points to maintain positive grip and minimize surface wear.
  • Forged Alloy Steel Construction: High-strength steel body delivers maximum structural durability and fatigue resistance under heavy mechanical loads.
  • Black Oxide Protective Finish: Corrosion-resistant surface finish resists rust, shop fluids, and chemical wear in harsh working environments.

What's Included

  • (1) Klein Tools D50512BS 12-Inch Straight Jaw Quick-Adjust Pump Pliers

Technical Specifications

Brand Klein Tools
Model Number D50512BS
Tool Type Quick-Adjust Pump Pliers
Nominal Length 12 in. (11.9 in. actual)
Jaw Capacity 2.87 in.
Number of Jaw Positions 18 Positions
Jaw Geometry & Teeth Straight Jaw / Directional Hardened Teeth
Jaw Dimensions (L x W x Thk) 1.5 in. x 0.33 in. x 0.33 in.
Material Forged Alloy Steel
Finish Black Oxide and Polish
Handle Type & Color Plastic Dipped (Orange)
Product Weight 1.04 lbs. (16.64 oz)
Pro-Tip: Press the quick-adjust pivot button to set the lower jaw parallel to large fittings before applying rotational force to distribute clamping pressure evenly across all teeth.