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PROTO Open End Wrench: Alloy Steel, Chrome, 5/8 in Head Size, 6 in Overall Lg - SAE, Double End, Open End Wrenches
PROTOSAE, Double End, Open End Wrenches

PROTO Open End Wrench: Alloy Steel, Chrome, 5/8 in Head Size, 6 in Overall Lg

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
Open End Wrench: Alloy Steel, Chrome, 5/8 in Head Size, 6 in Overall Lg
Category
SAE, Double End, Open End Wrenches
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

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
Automotive assembly — PROTO J72102 impact socket set for fastening lug nuts on production lines
Heavy equipment maintenance — PROTO J3772T flare nut wrench for hydraulic line fittings on excavators
General industrial repair — PROTO J795SA adjustable wrench set for tightening bolts on conveyor systems
Aerospace manufacturing — PROTO J5240A slotted bit socket for adjusting fasteners in confined spaces
Oil and gas pipeline work — PROTO J5438 12-point socket for valve assembly in refineries
Construction site toolkits — PROTO J8179-T500 double box wrench for structural steel bolting

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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