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PROTO J3120 SAE Double End Open End Wrench, 5/8 in, 6 in Overall Length - SAE, Double End, Open End Wrenches
PROTOSAE, Double End, Open End Wrenches

PROTO J3120 SAE Double End Open End Wrench, 5/8 in, 6 in Overall Length

The PROTO Open End Wrench is an SAE double-end open end wrench made from alloy steel with a chrome finish. It features a 5/8 in head size and a 6 in overall length, with manufacturer part number J3120.

SKU 3G-OTH-284782

Also listed as: J 3120 · J-3120

Brand
PROTO
Item
J3120 SAE Double End Open End Wrench, 5/8 in, 6 in Overall Length
Part Number
J3120
Category
SAE, Double End, Open End Wrenches
Available to Order
Also known as:J3120PROTO
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Technical Specifications

PROTO
Manufacturer Part Number
J3120
Type
Chrome, Std
Overall Lg
6 in
Head Size
5/8 in

Technical Documents

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PROTO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The PROTO Open End Wrench is an SAE double-end open end wrench made from alloy steel with a chrome finish. It features a 5/8 in head size and a 6 in overall length, with manufacturer part number J3120.

Frequently Asked Questions

What is the PROTO Open End Wrench J3120 used for?

The PROTO Open End Wrench J3120 is used for tightening or loosening hex fasteners in industrial maintenance, automotive repair, and mechanical assembly. Its SAE double-end design with a 5/8 in head size suits standard U.S. fasteners. The alloy steel construction and chrome finish provide corrosion resistance and durability in shop and field environments.

What are the specifications of the PROTO J3120 wrench?

The PROTO J3120 is an SAE double-end open end wrench made from alloy steel with a chrome finish. It has a 5/8 in head size and a 6 in overall length. The manufacturer part number is J3120. It is not a ratcheting or flex-head tool. PROTO is the OEM brand for this wrench.

Where to buy the PROTO J3120 wrench worldwide?

3G Electric supplies the PROTO J3120 open end wrench to customers worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We source and deliver genuine PROTO tools for industrial applications.

How to select the right PROTO open end wrench size?

To select the correct PROTO open end wrench, match the wrench head size to the fastener hex dimension. For the J3120, the 5/8 in head fits a 5/8 in hex nut or bolt. Ensure the wrench length (6 in) provides adequate leverage for the torque required. Always use the proper size to avoid rounding fasteners.

Used in

Common applications for PROTO
Industrial maintenance — PROTO J6014CXCERT micrometer torque wrench for tightening fasteners to 50–250 ft-lb with tether capability.
Assembly operations — PROTO J6345A electronic torque wrench for 5–50 ft-lb control with audible and visual indicators.
Plumbing and mechanical — PROTO J812HD straight pipe wrench with 2 in jaw capacity for gripping and turning pipes.
Precision fastening — PROTO J61929 multi-bit screw and nut driver kit with 26 alloy steel bits for assembly and maintenance.
Tool organization — PROTO JUC3743-3SG heavy-duty utility cart with drawers, power strip, and padlock for shop floor use.
Metric fastener service — PROTO JSCVM-20SB 20-piece ratcheting combination wrench set covering 6 mm to 32 mm.
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PROTO Products

3G Electric supplies PROTO sae, double end, open end wrenches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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