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PROTO Crowfoot Socket Wrench: Alloy Steel, Chrome, 3/8 in Drive Size - SAE Open End Crowfoot Wrenches
PROTOSAE Open End Crowfoot Wrenches

PROTO Crowfoot Socket Wrench: Alloy Steel, Chrome, 3/8 in Drive Size

The PROTO Crowfoot Socket Wrench is an SAE open end crowfoot wrench made of alloy steel with a chrome finish. It features a 3/8 in drive size and a 2 7/16 in head size, identified by manufacturer part number J4978CF.

SKU 3G-OTH-311991

Brand
PROTO
Item
Crowfoot Socket Wrench: Alloy Steel, Chrome, 3/8 in Drive Size
Category
SAE Open End Crowfoot Wrenches
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Technical Specifications

PROTO
Manufacturer Part Number
J4978CF
Type
Chrome
Head Size
2 7/16 in
Drive Size
3/8 in
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PROTO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The PROTO Crowfoot Socket Wrench is an SAE open end crowfoot wrench made of alloy steel with a chrome finish. It features a 3/8 in drive size and a 2 7/16 in head size, identified by manufacturer part number J4978CF.

Frequently Asked Questions

What is a PROTO J4978CF crowfoot socket wrench used for?

The PROTO J4978CF is an SAE open end crowfoot wrench used to access fasteners in tight spaces where a standard socket or wrench cannot fit. It is commonly applied in automotive, industrial maintenance, and assembly work requiring precise torque on hydraulic fittings or bolts.

What are the specifications of the PROTO J4978CF crowfoot wrench?

The PROTO J4978CF is an alloy steel crowfoot wrench with a chrome finish. It has a 3/8 in drive size and a 2 7/16 in head size. The manufacturer part number is J4978CF, and it is designed for SAE open end applications.

Where to buy PROTO J4978CF crowfoot wrench worldwide?

3G Electric supplies the PROTO J4978CF crowfoot wrench worldwide. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source genuine PROTO tools for global industrial customers.

How to select the correct crowfoot wrench size for a fastener?

To select the correct crowfoot wrench, match the head size to the fastener's hex or bolt dimension. For the PROTO J4978CF, the 2 7/16 in head fits SAE fasteners of that size. Always verify drive size compatibility—this model uses a 3/8 in drive—and ensure the wrench is rated for the required torque.

Used in

Common applications for PROTO
Automotive assembly — PROTO J72102 impact socket set for fastening lug nuts on production lines
Heavy equipment maintenance — PROTO J3772T flare nut wrench for hydraulic line fittings on excavators
General industrial repair — PROTO J795SA adjustable wrench set for tightening bolts on conveyor systems
Aerospace manufacturing — PROTO J5240A slotted bit socket for adjusting fasteners in confined spaces
Oil and gas pipeline work — PROTO J5438 12-point socket for valve assembly in refineries
Construction site toolkits — PROTO J8179-T500 double box wrench for structural steel bolting

PROTO Products

3G Electric supplies PROTO sae open end crowfoot wrenches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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