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PROTO Open End Wrench: Alloy Steel, Chrome, 12 mm Head Size, 5 1/4 in Overall Lg - Metric, Double End, Open End Wrenches
PROTOMetric, Double End, Open End Wrenches

PROTO Open End Wrench: Alloy Steel, Chrome, 12 mm Head Size, 5 1/4 in Overall Lg

The PROTO Open End Wrench is a metric, double-end, open-end wrench made from alloy steel with a chrome finish. It features a 12 mm head size and a 5 1/4 inch overall length, with the manufacturer part number J3112M.

SKU 3G-OTH-296103

Brand
PROTO
Item
Open End Wrench: Alloy Steel, Chrome, 12 mm Head Size, 5 1/4 in Overall Lg
Category
Metric, Double End, Open End Wrenches
Available to Order
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

PROTO
Manufacturer Part Number
J3112M
Type
Chrome, Std
Overall Lg
5 1/4 in
Head Size
12 mm

Technical Documents

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

Product Description

The PROTO Open End Wrench is a metric, double-end, open-end wrench made from alloy steel with a chrome finish. It features a 12 mm head size and a 5 1/4 inch overall length, with the manufacturer part number J3112M.

Frequently Asked Questions

What is the PROTO J3112M open end wrench used for?

The PROTO J3112M is a metric double-end open end wrench used for tightening or loosening 12 mm fasteners in industrial maintenance, assembly, and repair applications across machining, material handling, and other plant operations.

What are the specifications of the PROTO J3112M wrench?

The PROTO J3112M open end wrench is made from alloy steel with a chrome finish. It has a 12 mm head size and a 5 1/4 inch overall length. It is a metric, double-end, standard type wrench.

Where to buy the PROTO J3112M wrench worldwide?

3G Electric supplies the PROTO J3112M open end wrench worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on this PROTO part number.

How to select the correct PROTO open end wrench size?

To select the correct PROTO open end wrench, match the head size to the fastener dimension. For the J3112M, use it on 12 mm hex nuts or bolts. Ensure the wrench type (metric) matches your fastener system for proper fit and torque transfer.

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 metric, 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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