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PROTO J3751 SAE Double End Flare Nut Wrench, 3/8 in, 5 3/4 in - SAE, Double End, Standard-Head, 6-Point Flare Nut Wrenches
PROTOSAE, Double End, Standard-Head, 6-Point Flare Nut Wrenches

PROTO J3751 SAE Double End Flare Nut Wrench, 3/8 in, 5 3/4 in

The PROTO Flare Nut Wrench (MPN J3751) is an SAE, double-end, standard-head, 6-point flare nut wrench made of alloy steel with a satin finish. It features a 3/8 in head size and a 5 3/4 in overall length.

SKU 3G-OTH-311084

Also listed as: J 3751 · J-3751

Brand
PROTO
Item
J3751 SAE Double End Flare Nut Wrench, 3/8 in, 5 3/4 in
Category
SAE, Double End, Standard-Head, 6-Point Flare Nut Wrenches
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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
J3751
Type
Satin
Overall Lg
5 3/4 in
Head Size
3/8 in

Technical Documents

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

Product Description

The PROTO Flare Nut Wrench (MPN J3751) is an SAE, double-end, standard-head, 6-point flare nut wrench made of alloy steel with a satin finish. It features a 3/8 in head size and a 5 3/4 in overall length.

Frequently Asked Questions

What is the PROTO Flare Nut Wrench J3751 used for?

The PROTO Flare Nut Wrench J3751 is used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings. Its 6-point, double-end design grips the nut securely to prevent rounding, making it essential for automotive and industrial maintenance where leak-free connections are required.

What are the specifications of the PROTO Flare Nut Wrench J3751?

The PROTO Flare Nut Wrench J3751 is an SAE, double-end, standard-head, 6-point flare nut wrench made of alloy steel with a satin finish. It has a 3/8 in head size and a 5 3/4 in overall length. The manufacturer part number is J3751.

Where to buy the PROTO Flare Nut Wrench J3751 worldwide?

You can source the PROTO Flare Nut Wrench J3751 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations. Contact us for availability and lead time on this PROTO tool.

How to select the right flare nut wrench for brake lines?

To select the right flare nut wrench, match the head size to the nut on your brake line. The PROTO J3751 has a 3/8 in head size and a 6-point design that reduces slippage. Ensure the wrench is made of durable alloy steel, like this PROTO model, for repeated use on tight fittings.

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, standard-head, 6-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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Cross-referenced by specification & description
This PROTO flare nut wrench is a double-end, standard-head, 6-point design for SAE flare nuts. Made from alloy steel with a satin finish, it has a 9/16 in head size and 7 in overall length. Commonly used in automotive and industrial maintenance for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic systems
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This PROTO flare nut wrench is a double-end, standard-head, 6-point design for SAE flare nuts. Made from alloy steel with a satin finish, it has a 9/16 in head size and 7 in overall length. Commonly used in automotive and industrial maintenance for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic systems
This PROTO flare nut wrench is made from alloy steel with a satin finish. It features a 7/16 in head size and 6 in overall length, with a 6-point, double-end, standard-head SAE design. Used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings
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This PROTO flare nut wrench is made from alloy steel with a satin finish. It features a 7/16 in head size and 6 in overall length, with a 6-point, double-end, standard-head SAE design. Used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings
This PROTO flare nut wrench is made of alloy steel with a satin finish. It has a 3/8 in head size and a 5 3/4 in overall length. The double-end, 12-point design provides a secure grip on flare nuts commonly found on brake lines, fuel lines, and hydraulic fittings
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This PROTO flare nut wrench is made of alloy steel with a satin finish. It has a 3/8 in head size and a 5 3/4 in overall length. The double-end, 12-point design provides a secure grip on flare nuts commonly found on brake lines, fuel lines, and hydraulic fittings
Alloy steel construction with satin finish. Double-end, standard-head design with 12-point openings for 3/8 in and 7/16 in SAE flare nuts. Overall length 6 1/4 in. Used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings
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Alloy steel construction with satin finish. Double-end, standard-head design with 12-point openings for 3/8 in and 7/16 in SAE flare nuts. Overall length 6 1/4 in. Used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings
Alloy steel flare nut wrench with satin finish. Double-end, standard-head, 12-point design for 5/8 in and 11/16 in SAE fasteners. Overall length 8-3/4 in. Used for tightening or loosening flare nuts on brake, fuel, and hydraulic lines
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Alloy steel flare nut wrench with satin finish. Double-end, standard-head, 12-point design for 5/8 in and 11/16 in SAE fasteners. Overall length 8-3/4 in. Used for tightening or loosening flare nuts on brake, fuel, and hydraulic lines

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This SAE double-end flare nut wrench is made of alloy steel with a satin finish. It features 6-point heads sized 5/8 in and 11/16 in, with an overall length of 8-3/4 in. Designed for tightening or loosening flare nuts on fuel, brake, and hydraulic lines
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This SAE double-end flare nut wrench is made of alloy steel with a satin finish. It features 6-point heads sized 5/8 in and 11/16 in, with an overall length of 8-3/4 in. Designed for tightening or loosening flare nuts on fuel, brake, and hydraulic lines
This PROTO flare nut wrench is made from alloy steel with a satin finish. It features double-end, standard-head, 6-point design with 3/4 in and 7/8 in head sizes, and an overall length of 9 1/2 in. Used for tightening or loosening flare nuts on hydraulic, fuel, and refrigeration lines
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This PROTO flare nut wrench is made from alloy steel with a satin finish. It features double-end, standard-head, 6-point design with 3/4 in and 7/8 in head sizes, and an overall length of 9 1/2 in. Used for tightening or loosening flare nuts on hydraulic, fuel, and refrigeration lines
This PROTO flare nut wrench is made of alloy steel with a satin finish. It features a double-end, standard-head, 6-point design with an 11/16 in head size and 8 3/4 in overall length. Used for tightening or loosening flare nuts on fuel, brake, and hydraulic lines without damaging the fitting
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This PROTO flare nut wrench is made of alloy steel with a satin finish. It features a double-end, standard-head, 6-point design with an 11/16 in head size and 8 3/4 in overall length. Used for tightening or loosening flare nuts on fuel, brake, and hydraulic lines without damaging the fitting
Alloy steel flare nut wrench with satin finish. Double-end, standard-head, 6-point design fits 1/2 in flare nuts. Overall length 6-1/2 in. Used for tightening or loosening flare nuts on hydraulic, fuel, and refrigeration lines
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Alloy steel flare nut wrench with satin finish. Double-end, standard-head, 6-point design fits 1/2 in flare nuts. Overall length 6-1/2 in. Used for tightening or loosening flare nuts on hydraulic, fuel, and refrigeration lines
Alloy steel construction with satin finish. Double-end, standard-head design with 6-point openings for 3/8 in and 7/16 in SAE flare nuts. Overall length of 6 1/4 in. Used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings
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Alloy steel construction with satin finish. Double-end, standard-head design with 6-point openings for 3/8 in and 7/16 in SAE flare nuts. Overall length of 6 1/4 in. Used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings
This SAE double-end flare nut wrench features a 6-point design for securely gripping flare nuts without rounding. Made of alloy steel with a satin finish, it has a 5/8 in head size and 7 3/4 in overall length. Commonly used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings
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This SAE double-end flare nut wrench features a 6-point design for securely gripping flare nuts without rounding. Made of alloy steel with a satin finish, it has a 5/8 in head size and 7 3/4 in overall length. Commonly used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings
This SAE double-end flare nut wrench features 1/2 in and 9/16 in head sizes with a 6-point design for secure grip on flare nuts. Made of alloy steel with a satin finish, it has a 7-1/2 in overall length. Typical applications include tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings
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This SAE double-end flare nut wrench features 1/2 in and 9/16 in head sizes with a 6-point design for secure grip on flare nuts. Made of alloy steel with a satin finish, it has a 7-1/2 in overall length. Typical applications include tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings
Double-end, standard-head, 6-point SAE flare nut wrench made from alloy steel with a satin finish. Head size is 3/4 in; overall length is 9 1/4 in. Used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings in automotive and industrial maintenance
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Double-end, standard-head, 6-point SAE flare nut wrench made from alloy steel with a satin finish. Head size is 3/4 in; overall length is 9 1/4 in. Used for tightening or loosening flare nuts on brake lines, fuel lines, and hydraulic fittings in automotive and industrial maintenance