Product Description
This offset striking box-end wrench is forged from premium 40Cr alloy steel, offering high strength, excellent toughness, and dependable durability. The wrench is fully heat treated to improve hardness, impact resistance, and long-term service life for heavy-duty industrial fastening work.
Its unique offset/angled box-end design provides extra clearance around flanges, pipes, brackets, protruding studs, and adjacent equipment components. The enclosed ring profile surrounds hex nuts and bolts more completely, distributing force evenly and helping reduce slipping, rounding, and fastener damage.
The reinforced striking end can be used with a hammer to apply additional impact force for large, high-torque, rusted, or long-installed fasteners. A black coated finish provides low glare, rust resistance, corrosion protection, and improved durability in workshop, outdoor, and industrial environments. This series is available in sizes from 22mm to 75mm.
Features
- Premium Forged 40Cr Steel: High-quality material with high strength and excellent toughness for heavy-duty industrial fastening.
- Full Heat Treatment: Fully heat treated for improved hardness, impact resistance, wear resistance, and service life.
- Offset Angled Head Design: Curved/offset ring head provides clearance around flanges, pipes, brackets, and protruding components.
- Enclosed Box-End Profile: Fully engages hex fasteners for balanced force distribution and reduced slipping or corner damage.
- Reinforced Striking End: Can be struck with a suitable hammer to add impact force for difficult fastening or removal tasks.
- Black Coated Surface: Low-glare black finish with practical rust resistance, corrosion protection, and wear durability.
- Designed for Restricted Access: Ideal for recessed positions, obstructed fasteners, and special-angle applications where straight striking wrenches cannot work effectively.
Specifications
| Item No. | Size | Overall Length (L) | Inner Pack | Carton Qty. | Unit Weight | Gross Weight |
|---|---|---|---|---|---|---|
| W16722 | 22 mm | 155 mm | 1 pc | 60 pcs | 0.23 kg | 14.80 kg |
| W16724 | 24 mm | 165 mm | 1 pc | 60 pcs | 0.25 kg | 16.00 kg |
| W16727 | 27 mm | 175 mm | 1 pc | 36 pcs | 0.35 kg | 13.60 kg |
| W16730 | 30 mm | 185 mm | 1 pc | 36 pcs | 0.45 kg | 17.20 kg |
| W16732 | 32 mm | 185 mm | 1 pc | 36 pcs | 0.45 kg | 17.20 kg |
| W16736 | 36 mm | 204 mm | 1 pc | 24 pcs | 0.45 kg | 11.80 kg |
| W16741 | 41 mm | 225 mm | 1 pc | 24 pcs | 0.85 kg | 21.40 kg |
| W16746 | 46 mm | 240 mm | 1 pc | 18 pcs | 1.05 kg | 19.80 kg |
| W16750 | 50 mm | 255 mm | 1 pc | 16 pcs | 1.30 kg | 21.80 kg |
| W16755 | 55 mm | 270 mm | 1 pc | 12 pcs | 1.50 kg | 19.00 kg |
| W16760 | 60 mm | 285 mm | 1 pc | 12 pcs | 1.65 kg | 20.80 kg |
| W16765 | 65 mm | 305 mm | 1 pc | 10 pcs | 2.05 kg | 21.50 kg |
| W16770 | 70 mm | 325 mm | 1 pc | 8 pcs | 2.65 kg | 22.40 kg |
| W16775 | 75 mm | 335 mm | 1 pc | 8 pcs | 2.80 kg | 23.40 kg |
Applications
This offset striking box-end wrench is suitable for:
- Oil, gas, petrochemical, and refinery equipment maintenance
- Pipeline, valve, flange, and large connection installation
- Construction machinery, mining machinery, and heavy equipment repair
- Shipbuilding, offshore engineering, and port equipment servicing
- Wind power, thermal power, hydropower, and energy facility maintenance
- Steel structures, bridges, tunnels, and large construction projects
- Railway, rail transit, and heavy vehicle maintenance
- Fastening tasks in machinery interiors, recessed positions, and special-angle locations
- Applications requiring clearance around obstacles, flange edges, pipes, or protruding studs
Why Choose Us
40Cr Steel with Full Heat Treatment
Forged from premium 40Cr steel and fully heat treated for a reliable balance of strength, toughness, and impact resistance.
Offset Head for Difficult Access
The angled box end helps bypass pipes, flanges, brackets, and protruding parts, providing better access in complex installation locations.
Secure Box-End Force Transfer
The enclosed ring profile fully engages the fastener for even torque transfer, especially suitable for high-torque and heavy-duty maintenance work.
Low-Glare Black Coated Finish
Black coating reduces glare while improving rust resistance, corrosion protection, and wear durability for industrial and outdoor conditions.
Practical Large Size Coverage
Available from 22mm to 75mm for valves, flanges, machinery, structural connections, and engineering maintenance.
Flexible OEM / ODM Support
Custom logos, sizes, coating colors, packaging, and industrial tool sets are available for distributors, brands, and project buyers.
FAQ
Q1: What is the difference between an offset striking box wrench and a standard striking box wrench?
A1: A standard striking box wrench usually has a straight handle. An offset striking box wrench has an angled/offset ring head that provides additional clearance around flanges, pipes, brackets, and protruding studs for special-angle or restricted-access work.
Q2: Why use an enclosed box end?
A2: The enclosed box end surrounds the hex nut or bolt more completely, providing balanced force transfer and helping reduce slipping, rounding, and fastener corner damage.
Q3: What are the advantages of the black coated surface?
A3: The black coating provides a low-glare finish and offers good rust resistance, corrosion protection, and wear durability for workshop, outdoor, and industrial use.
Q4: Can it be used on rusted or high-torque nuts?
A4: Yes, it is suitable for heavy-duty fastening and removal. The striking end can be used with a suitable hammer to apply impact force. For severely seized fasteners, use penetrating lubricant and appropriate professional removal procedures.
Q5: What safety precautions should be followed?
A5: Select the correct size and ensure the box end fully engages the fastener. Strike only the designated striking end. Wear safety glasses and gloves, avoid side loading, and do not overload the tool.
Q6: Which sizes are available?
A6: Available sizes include 22, 24, 27, 30, 32, 36, 41, 46, 50, 55, 60, 65, 70, and 75mm.
Q7: Do you support customization?
A7: Yes. OEM/ODM customization is available for wrench sizes, offset angles, logos, surface finishes, packaging, and set configurations.
OEM / ODM (Optional)
We offer flexible OEM / ODM services:
- Custom Dimensions & Structure: Box-end sizes, wrench lengths, head thickness, offset angles, and striking-end structures can be customized.
- Custom Branding: Laser engraving, steel stamping, screen printing, ink printing, labels, and private-label packaging.
- Custom Surface Finishes: Black coating, black phosphate, black oxide, sandblasting, chrome plating, pearl nickel, and more.
- Custom Packaging: Hang cards, plastic holders, pouches, color boxes, tool cases, inner boxes, and printed cartons.
- Custom Industrial Tool Sets: Common sizes can be configured for petrochemical, pipeline, mining, marine, and heavy machinery maintenance applications.
- Sampling and Mass Production: Support for drawing-based or sample-based development, sample approval, and stable bulk supply.
Please send us your size list, drawings, branding artwork, samples, or project requirements for a customized solution.
