PROTO Flare Nut Wrench: Alloy Steel, Satin, 3/8 in Head Size
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
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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 PROTOPROTO 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.














