PROTO Flare Nut Wrench: Alloy Steel, Satin, 5/8 in_11/16 in Head Size, 8 3/4 in Overall Lg
The PROTO Flare Nut Wrench (MPN J3772) is an SAE, double-end, standard-head, 6-point flare nut wrench made of alloy steel with a satin finish. It features 5/8 in and 11/16 in head sizes and an overall length of 8 3/4 in.
SKU 3G-OTH-311094
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Product Description
The PROTO Flare Nut Wrench (MPN J3772) is an SAE, double-end, standard-head, 6-point flare nut wrench made of alloy steel with a satin finish. It features 5/8 in and 11/16 in head sizes and an overall length of 8 3/4 in.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is a PROTO Flare Nut Wrench used for?
A PROTO Flare Nut Wrench is designed for tightening or loosening flare nuts on fuel, brake, and hydraulic lines. Its 6-point, double-end configuration grips the nut flats securely, reducing the risk of rounding or damaging soft metal fittings in automotive and industrial maintenance applications.
What are the specifications of the PROTO J3772 Flare Nut Wrench?
The PROTO J3772 Flare Nut Wrench is an SAE double-end, standard-head, 6-point wrench made of alloy steel with a satin finish. It has head sizes of 5/8 in and 11/16 in, with an overall length of 8 3/4 in. The manufacturer part number is J3772.
Where to buy a PROTO Flare Nut Wrench worldwide?
3G Electric supplies the PROTO Flare Nut Wrench (J3772) to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this PROTO wrench for your maintenance or repair needs.
How to select the right flare nut wrench size?
To select the correct flare nut wrench, measure the hex nut on the fitting across the flats. The PROTO J3772 covers 5/8 in and 11/16 in SAE sizes. Always match the wrench size exactly to the nut to prevent slippage and damage. For metric fittings, choose a corresponding metric flare nut wrench.
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.














