WR4101H Adjustable Hook Spanner Wrench, Square Head, 19-51mm (3/4"-2"), 50CrV Steel, Matte Chrome
This adjustable hook spanner wrench features a square head design with an adjustment range of 19-51mm (3/4″-2″). Forged from 50CrV steel, heat-treated to 42-46 HRC, and finished with matte chrome over a sandblasted and ground surface. Overall length 160mm, weight 178g. Designed for tightening and loosening round nuts, lock rings, and collar nuts on machinery and equipment.
We also offer this product with an adjustment range of 32-76mm, 51-121mm, and 115-170mm.
Specifications
42-46 HRC
Product Description
Precision Square Head for Positive Engagement: The square hook profile mates securely with slots on round nuts and locking rings, preventing slippage during torque application. This design is particularly effective on shaft collars, bearing locknuts, and spindle nuts found in industrial machinery, where a standard open-end wrench cannot gain purchase.
Wide Adjustment Range for Versatile Fit: The adjustable jaw covers diameters from 19mm to 51mm (3/4 to 2 inches), accommodating common locknut sizes on milling machines, lathes, presses, and heavy equipment. One tool replaces a full set of fixed-size hook spanners, reducing tool clutter in maintenance carts.
Durable 50CrV Steel with Full Hardening: Made from chrome-vanadium alloy steel and heat-treated throughout to 42-46 HRC, this wrench resists bending and jaw deformation under heavy load. The uniform hardness ensures consistent performance across the entire adjustment range.
Matte Chrome Finish for Corrosion Resistance: The surface undergoes sandblasting, grinding, then matte chrome plating, providing a non-reflective, durable finish that resists rust in workshop and field environments. The textured surface improves grip when hands are oily.
Compact 160mm Length for Access in Tight Spaces: At 160mm overall length and 178g weight, this wrench fits easily into tool drawers and pouches. The compact size allows access to locknuts recessed inside machine frames or behind panels – common when adjusting bearings on conveyor rollers or replacing seals on hydraulic cylinders.
