Description
Proto J3740 Flare Nut Wrench Set
Proto J3740 Flare Nut Wrench Set supports cleaning, service, maintenance and professional use. PROTO Set Wr Flare Nut 9 Pc. PROTO 9-piece double-end flare nut wrench set with 6-point box ends for automotive service. Designed for working on flare nuts and recessed fasteners with improved access, knuckle clearance, and torque transfer. The Proto J3740 set carries a clear, easy-to-reorder SKU so buyers can stock and resupply with verified product data.
Key Features and Benefits of PROTO Set Wr Flare Nut 9 Pc
- This Proto J3740 is built for B2B purchasing, field use and inventory resupply.
- Useful for contractors, maintenance teams, service vehicles and distributor inventory programs.
- Designed for working on flare nuts and recessed fasteners with improved access, knuckle clearance, and torque transfer.
- PROTO 9-piece double-end flare nut wrench set with 6-point box ends for automotive service.
- Included components allow immediate use: Proto 9 Piece Double End Flare Nut Wrench Set – 6 Point.
- Verified model number and manufacturer part number: J3740.
- Genuine OEM Proto product sourced for professional and trade use.
Technical Specifications
| Model / MPN | J3740 |
|---|---|
| Brand | Proto |
| Sub-brand | TorquePlus |
| Manufacturer | Stanley Black & Decker |
| Part Type | PROTO Set Wr Flare Nut 9 Pc |
| Category | Tools |
| Product Type | Flare Nut Wrench Set |
| Material | Steel wrenches |
| Country of Origin | United States of America |
| UPC | 662679138769 |
| Package Quantity | 1 |
| Included Components | Proto 9 Piece Double End Flare Nut Wrench Set – 6 Point |
| Application | Automotive |
Compatibility of Proto set
Proto J3740 Flare Nut Wrench Set is intended for buyers who need clear compatibility data. Compatible brands: PROTO. Double-end 6-point flare nut wrench set designed for automotive applications requiring access to recessed fasteners. Buyers should confirm compatibility and configuration before ordering the Proto J3740 set.
Use and Installation
Using this tool is straightforward for professional users. First, check the included components and confirm the compatible platform. Then follow the manufacturer guidance and basic safety rules for the Proto J3740 set. For fleet deployments, keep spares on hand to avoid downtime.
Wholesale and Distribution
The PROTO Set Wr Flare Nut 9 Pc is a practical item for B2B catalogs serving contractors, distributors, service companies and maintenance teams. Safe Appliances supplies the Proto J3740 set with bulk pricing, recurring reorders and mixed-brand pallets across our distribution centers. Request a wholesale quote for volume orders, MOQ flexibility and lead-time planning.
Additional Information
Safe Appliances supplies the PROTO Set Wr Flare Nut 9 Pc for professional purchasing. We focus on verified product data, clear specifications and reliable trade supply. Source does not provide set dimensions, weight by component, or individual wrench sizes. Contact our team for datasheets, compliance documents or fitment confirmation for J3740.
Gabriela Lowell (verified owner) –
The J3740 flare nut wrench set is useful for service teams working around hydraulic, fuel, and refrigeration-style fittings.
Miles Gallagher (verified owner) –
This PROTO set is a good fit for technicians who need better access to recessed or hard-to-reach line fittings.
Graham Cruz (verified owner) –
The J3740 works well as a technician tool set for industrial maintenance and equipment repair programs.
Trey Barrera (verified owner) –
The wrench set is compact enough for service carts while still covering common flare nut needs.
Keith Baxter (verified owner) –
Maintenance buyers can use this set to support teams working on mechanical systems with line connections.
Jamie Hodge (verified owner) –
This product has a clear professional use case, which makes it easy to include in B2B tool assortments.
Lara Poole (verified owner) –
The J3740 is a strong hand tool choice for line service and controlled fastener access work.
Nicolette Brennan (verified owner) –
Repair operations can stock this flare nut wrench set for technicians who need the right tool for line fittings.
Greta Cantu (verified owner) –
This wrench set helps solve access problems around fittings where standard wrenches are not ideal.
Natalia Moyer (verified owner) –
The J3740 is a practical industrial hand tool set for mechanical and facilities service teams.
Elena Hendricks (verified owner) –
Tool room managers can issue this set for jobs where line fittings and offset access matter.
Holden Lloyd (verified owner) –
The set is useful for specialized repairs that require flare nut wrench geometry rather than open-end tools.
Laura Arroyo (verified owner) –
This is a solid PROTO wrench set for professional buyers who maintain equipment with line connections.