Proto j5120 Torque Adapter 3/8 in Drive 5/8 in

Product Description

The PROTO j5120 is a 3/8 inch drive torque adapter designed to simplify torque calibration procedures in professional tool service and fastener applications. The adapter measures 2 inches from the center of the square drive to the center of the adapter opening, a critical dimension when calculating actual applied torque at an offset. Built to standard (non-impact) use, this 5/8 inch adapter features a 12-point socket configuration and is machined from metal with a silver finish. It is a new-condition, American-made tool backed by a lifetime warranty against manufacturer defects.

The j5120 is suited for professional technicians and calibration specialists who need accurate torque transfer when using a torque wrench with an offset adapter. Typical applications include engine service, mechanical assembly, and torque wrench calibration setups where the effective length correction must be accounted for. The standard drive design makes it compatible with 3/8 inch drive torque wrenches used in automotive, HVAC, and general mechanical trade work.

Key Features

• 3/8 inch square drive accepts standard torque wrenches
• 5/8 inch adapter opening with 12-point socket configuration
• 2-inch center-to-center offset dimension for accurate torque correction calculations
• Standard (non-impact) use construction
• Made in the United States
• Lifetime warranty against manufacturer defects

Compatibility

Designed as a standard-use torque adapter for 3/8 inch drive torque wrenches requiring a 5/8 inch fastener interface.

Installation Notes

Installation and use should be performed by a qualified mechanic or calibration technician familiar with offset torque adapter correction formulas. Always calculate the corrected torque value based on the 2-inch center-to-center offset before applying load to the wrench. Ensure the torque wrench and adapter are fully seated before applying force. Do not use this adapter with impact drivers or impact wrenches.

Technical Specifications

• Drive Size: 3/8 inches
• Adapter Size: 5/8 inches
• Socket Points: 12
• Center-to-Center Offset: 2 inches
• Drive Type: Standard
• Material: Metal
• Color: Silver
• Weight: 0.9 pounds
• Country of Origin: United States
• Warranty: Lifetime against manufacturer defects

Standard Information

• Brand: PROTO
• Manufacturer Part Number: j5120