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PROTO Socket Bit: 3/8 in Drive Size, Hex Tip, 4 mm Tip Size, 2 3/4 in Overall Lg - Hex Bit Sockets
PROTOHex Bit Sockets

PROTO Socket Bit: 3/8 in Drive Size, Hex Tip, 4 mm Tip Size, 2 3/4 in Overall Lg

The PROTO Socket Bit (SKU 56JR98, MPN J4990R-4M) is a hex bit socket with a 3/8 in drive size and a 4 mm hex tip size. It features a fixed insert design and has an overall length of 2 3/4 in. This PROTO-branded tool…

SKU 3G-OTH-305532

Brand
PROTO
Item
Socket Bit: 3/8 in Drive Size, Hex Tip, 4 mm Tip Size, 2 3/4 in Overall Lg
Category
Hex Bit Sockets
Available to Order
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Technical Specifications

PROTO
Manufacturer Part Number
J4990R-4M
Type
Hex Tip, Fixed Insert
Overall Lg
2 3/4 in
Tip Size
4 mm
View Full Spec Sheet

Technical Documents

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PROTO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The PROTO Socket Bit (SKU 56JR98, MPN J4990R-4M) is a hex bit socket with a 3/8 in drive size and a 4 mm hex tip size. It features a fixed insert design and has an overall length of 2 3/4 in. This PROTO-branded tool is a hex bit socket for industrial applications.

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 hex bit sockets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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PROTO Socket: Metric, 1/4 in Drive Size, 11 mm Socket Size, 6-Point, Std, Chrome, Not Tether Capable (MPN J4711M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
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