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PROTO J3812M Metric Single End Ratcheting 12-Point Flare Nut Wrench, 12 mm - Metric, Single End, Ratcheting 12-Point Flare Nut Wrenches
PROTOMetric, Single End, Ratcheting 12-Point Flare Nut Wrenches

PROTO J3812M Metric Single End Ratcheting 12-Point Flare Nut Wrench, 12 mm

The PROTO J3812M is a metric, single-end, ratcheting 12-point flare nut wrench made from alloy steel with a black oxide finish. It features a 12 mm head size and an overall length of 5 1/2 inches.

SKU 3G-OTH-313283

Brand
PROTO
Item
J3812M Metric Single End Ratcheting 12-Point Flare Nut Wrench, 12 mm
Part Number
J3812M
Category
Metric, Single End, Ratcheting 12-Point Flare Nut Wrenches
Available to Order
Also known as:J3812MPROTO
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Technical Specifications

PROTO
Manufacturer Part Number
J3812M
Type
Black Oxide
Overall Lg
5 1/2 in
Head Size
12 mm

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

Product Description

The PROTO J3812M is a metric, single-end, ratcheting 12-point flare nut wrench made from alloy steel with a black oxide finish. It features a 12 mm head size and an overall length of 5 1/2 inches.

Frequently Asked Questions

What is the PROTO J3812M flare nut wrench used for?

The PROTO J3812M is a metric, single-end, ratcheting 12-point flare nut wrench designed for tightening or loosening flare nuts on brake lines, fuel systems, and hydraulic fittings. Its 12 mm head size and 5 1/2 in overall length provide access in tight spaces common in automotive and industrial maintenance.

What are the specifications of the PROTO J3812M flare nut wrench?

The PROTO J3812M is made from alloy steel with a black oxide finish. It has a 12 mm head size, 5 1/2 in overall length, and features a ratcheting 12-point design. The manufacturer part number is J3812M. It is a metric, single-end flare nut wrench suitable for professional use.

Where to buy the PROTO J3812M flare nut wrench worldwide?

3G Electric supplies the PROTO J3812M flare nut wrench worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this alloy steel, black oxide wrench with a 12 mm head size.

How to select the right flare nut wrench size?

To select the correct flare nut wrench, measure the nut's hex size across the flats. The PROTO J3812M fits a 12 mm flare nut. Ensure the wrench is made from durable alloy steel, like this PROTO model, to resist spreading under torque. A ratcheting 12-point design helps in confined spaces.

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 metric, single end, ratcheting 12-point flare nut wrenches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Alloy steel construction with black oxide finish. Single-end ratcheting 12-point design for 16 mm flare nuts. Overall length 7 1/4 in. Used on brake lines, fuel systems, and hydraulic fittings
PROTO
Alloy steel construction with black oxide finish. Single-end ratcheting 12-point design for 16 mm flare nuts. Overall length 7 1/4 in. Used on brake lines, fuel systems, and hydraulic fittings

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