QJXM21A - Williams - 21 mm Box‑End Torque Adapter with J‑Shank

The Williams QJXM21A Torque Adapter is built for technicians who require accurate, repeatable torque application on 21 mm fasteners found in industrial machinery, hydraulic components, mechanical assemblies, and heavy‑equipment maintenance.

Its box‑end configuration provides full‑surface, wrap‑around contact with the fastener, significantly reducing rounding and ensuring superior grip compared to open‑end torque adapters. This makes the QJXM21A especially effective in torque‑critical applications, where maintaining joint integrity and precision is essential.

The rugged J‑Shank interface allows the adapter to integrate securely with compatible Williams torque wrench systems. This ensures consistent alignment, rigidity, and torque delivery whether used with manual, hydraulic, or electronic torque tools.

Constructed from premium high‑strength alloy steel, the QJXM21A is engineered to withstand heavy torque cycles, vibration, impact, and harsh industrial environments while maintaining long‑term durability and accuracy.

Ideal for professionals in industrial maintenance, hydraulic repair, mechanical service, and heavy‑equipment operations, this torque head delivers dependable performance shift after shift.

Key Features

• Size: 21 mm
• Type: Torque adapter / torque head
• Head Style: Box End (full‑contact)
• Shank Style: J‑Shank
• Full‑wrap engagement improves torque accuracy and reduces rounding
• Precision‑machined for stable, repeatable torque delivery
• Built from high‑strength alloy steel for long service life
• Compatible with Williams J‑Shank torque systems
• Ideal for industrial, mechanical, hydraulic, and heavy‑equipment applications