WR2858H Crescent Hook Spanner, 22-26mm Range, 45# Steel, Black Oxide
This crescent hook spanner has an adjustment range of 22-26mm, designed for tightening and loosening round nuts with slotted or notched faces. Made from 45# steel, drop-forged, heat-treated to 30-35 HRC, and finished with black oxide. Overall length 127mm, weight 40g. Ideal for precision adjustments on machinery, cameras, and optical equipment.
We also offer this product in larger sizes up to 165-170mm.
Specifications
Drop-Forged, 30-35 HRC
Product Description
Compact Size for Precision Work: With a 127mm length and only 40g weight, this small hook spanner is designed for delicate adjustments where larger wrenches would be cumbersome. It fits easily into tool kits for instrument repair, bicycle maintenance, or small engine work.
22-26mm Range for Common Lock Nut Sizes: The adjustment range covers frequently encountered round nuts on spindles, shafts, and retaining rings in compact machinery. One wrench handles multiple sizes, reducing the need for a full set when working on gearboxes, power tools, or camera lens assemblies.
Drop-Forged 45# Steel with Black Oxide: The wrench body is drop-forged from 45# carbon steel, then heat-treated to 30-35 HRC for a balance of strength and slight flexibility. The black oxide finish provides basic corrosion resistance and a non-reflective surface – preferred when working near optical paths or in brightly lit repair benches.
Hook Design for Slotted Round Nuts: The crescent-shaped hook engages precisely with the slots on round lock nuts. This design is essential for adjusting bearing preload on small spindles, tensioning rings on microscopes, or servicing collet nuts on hobbyist lathes.
Lightweight for Tool Bags and Field Kits: At just 40g, this wrench adds negligible weight to a technician’s carry kit. It is a practical addition for field service engineers who repair medical devices, office equipment, or small appliances where specialized tools are required but weight limits apply.
