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PROTO Socket: Metric, 3/4 in Drive Size, 21 mm Socket Size, 12-Point, Std, Satin - 3/4" Drive Hand Sockets
PROTO3/4" Drive Hand Sockets

PROTO Socket: Metric, 3/4 in Drive Size, 21 mm Socket Size, 12-Point, Std, Satin

The PROTO Socket: Metric (MPN J5521M) is a 3/4" Drive Hand Socket with a 21 mm socket size and 12-point configuration. It features a satin finish and is not tether capable. This standard-length socket is manufactured…

SKU 3G-OTH-315093

Brand
PROTO
Item
Socket: Metric, 3/4 in Drive Size, 21 mm Socket Size, 12-Point, Std, Satin
Category
3/4" Drive Hand Sockets
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Technical Specifications

PROTO
Manufacturer Part Number
J5521M
Type
12-Point, Std, Satin, Not Tether Capable
Socket Size
21 mm
Drive Size
3/4 in
View Full Spec Sheet

Technical Documents

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

Product Description

The PROTO Socket: Metric (MPN J5521M) is a 3/4" Drive Hand Socket with a 21 mm socket size and 12-point configuration. It features a satin finish and is not tether capable. This standard-length socket is manufactured by PROTO.

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 3/4" drive hand 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, 3/4 in Drive Size, 25 mm Socket Size, 12-Point, Std, Satin, Not Tether Capable (MPN J5525M). Key specifications — attr1204417: PROTO; attr1204392: Satin.
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