Proto J4914HFL Flare Nut Crowfoot Wrench 7/16 Inch

Product Description

The PROTO J4914HFL is a 7/16-inch flare nut crowfoot wrench designed for turning flare fittings and line nuts in confined spaces where a standard open-end or box wrench cannot seat properly. The crowfoot profile engages the fitting on six points, distributing load evenly and reducing the chance of rounding soft brass or aluminum fittings. At 1.5 inches in overall length and with a head thickness of 0.25 inches, it fits into tight quarters around tubing runs common in HVAC refrigerant lines, hydraulic systems, and plumbing supply connections. The chrome-plated finish resists corrosion and surface rust. ASME B107.21 compliance confirms the tool meets dimensional and performance standards recognized across the trade.

This crowfoot wrench is suited for HVAC technicians working refrigerant line sets and service valves, plumbers tightening compression or flare fittings in confined cabinet spaces, and mechanics servicing hydraulic and fuel line connections. Its 3/8-inch or 1/4-inch drive compatibility through a standard crowfoot socket fitting allows it to pair with a torque wrench where controlled torque is required on soft-material fittings. It is sized for 7/16-inch flare nut applications common in residential and light commercial installations.

Key Features

• 7/16-inch wrench size for flare nut and line fitting applications
• 6-point engagement reduces fastener rounding on soft fittings
• Head diameter of 29/32 inches with a 0.25-inch head thickness for tight-clearance access
• 1.5-inch overall length fits standard crowfoot socket drive setups
• Chrome-plated finish for corrosion resistance
• Meets ASME B107.21 and Federal Specification GGG-C-1507b
• Limited Lifetime Warranty

Compatibility

Designed for use with standard 3/8-inch or 1/4-inch drive torque wrenches and ratchets via crowfoot socket attachment; sized for 7/16-inch flare nut fittings in HVAC, plumbing, and mechanical service applications.

Installation Notes

A licensed HVAC technician or plumber should confirm the system is depressurized and isolated before loosening or tightening any flare fittings. Pair this crowfoot with a calibrated torque wrench when manufacturer torque values are specified for the fitting being serviced. Inspect the fitting and tubing flare for damage before seating the wrench to avoid compounding existing defects. Follow applicable codes, including ASHRAE 15 for refrigerant systems and IPC provisions for plumbing flare connections.