PROTO Flare Nut Wrench: Alloy Steel, Black Oxide, 3/8 in Head Size
The PROTO J3812 is a single-end, ratcheting 12-point SAE flare nut wrench made from alloy steel with a black oxide finish. It features a 3/8 in head size and an overall length of 5 1/2 in.
SKU 3G-OTH-594832
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Product Description
The PROTO J3812 is a single-end, ratcheting 12-point SAE flare nut wrench made from alloy steel with a black oxide finish. It features a 3/8 in head size and an overall length of 5 1/2 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 the PROTO J3812 flare nut wrench used for?
The PROTO J3812 is a single-end, ratcheting 12-point SAE flare nut wrench designed for tightening or loosening flare nuts on brake lines, fuel systems, and hydraulic fittings. Its 3/8 in head size and 5 1/2 in overall length provide access in tight spaces, while the black oxide finish resists corrosion.
What are the specifications of the PROTO J3812 flare nut wrench?
The PROTO J3812 is an alloy steel, black oxide finished flare nut wrench with a 3/8 in head size and 5 1/2 in overall length. It is a single-end, ratcheting 12-point SAE design. The manufacturer part number is J3812, and it is not a reversible model.
Where to buy the PROTO J3812 flare nut wrench worldwide?
3G Electric supplies the PROTO J3812 flare nut wrench to customers 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.
How to maintain a PROTO flare nut wrench?
To maintain your PROTO J3812 flare nut wrench, clean it after use with a dry cloth to remove debris and moisture. Apply a light coat of oil to the black oxide finish to prevent rust. Store in a dry environment. Avoid using on damaged fasteners to preserve the 12-point ratcheting mechanism.
Used in
Common applications for PROTOPROTO Products
3G Electric supplies PROTO sae, 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.






