We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
⌕
RFQ CartGet a QuoteSign inSign up
PROTO Socket: Metric, 1/2 in Drive Size, 21 mm Socket Size, 12-Point, Std, Chrome - 1/2" Drive Hand Sockets
PROTO1/2" Drive Hand Sockets

PROTO Socket: Metric, 1/2 in Drive Size, 21 mm Socket Size, 12-Point, Std, Chrome

The PROTO Socket: Metric is a 1/2" Drive Hand Socket, model J5421M, featuring a 21 mm, 12-point standard socket size in a chrome finish. This industrial-grade socket is designed for professional use in metric…

SKU 3G-OTH-317861

Brand
PROTO
Item
Socket: Metric, 1/2 in Drive Size, 21 mm Socket Size, 12-Point, Std, Chrome
Category
1/2" Drive Hand Sockets
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

PROTO
Manufacturer Part Number
J5421M
Type
12-Point, Std, Chrome, Socket
Socket Size
21 mm
Drive Size
1/2 in
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The PROTO Socket: Metric is a 1/2" Drive Hand Socket, model J5421M, featuring a 21 mm, 12-point standard socket size in a chrome finish. This industrial-grade socket is designed for professional use in metric fastening 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 1/2" drive hand sockets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
PROTO Socket: Metric, 1/2 in Drive Size, 21 mm Socket Size, 6-Point, Std, Chrome, Not Tether Capable (MPN J5421MH). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: Metric, 1/2 in Drive Size, 21 mm Socket Size, 6-Point, Std, Chrome, Not Tether Capable (MPN J5421MH). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: Metric, 1/2 in Drive Size, 22 mm Socket Size, 12-Point, Std, Chrome, Socket (MPN J5422M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: Metric, 1/2 in Drive Size, 22 mm Socket Size, 12-Point, Std, Chrome, Socket (MPN J5422M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: Metric, 1/2 in Drive Size, 23 mm Socket Size, 12-Point, Std, Chrome, Socket (MPN J5423M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: Metric, 1/2 in Drive Size, 23 mm Socket Size, 12-Point, Std, Chrome, Socket (MPN J5423M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: Metric, 1/2 in Drive Size, 14 mm Socket Size, 12-Point, Std, Chrome, Socket (MPN J5414M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: Metric, 1/2 in Drive Size, 14 mm Socket Size, 12-Point, Std, Chrome, Socket (MPN J5414M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: Metric, 1/2 in Drive Size, 20 mm Socket Size, 6-Point, Std, Chrome, Not Tether Capable (MPN J5420MH). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: Metric, 1/2 in Drive Size, 20 mm Socket Size, 6-Point, Std, Chrome, Not Tether Capable (MPN J5420MH). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: Metric, 1/2 in Drive Size, 31 mm Socket Size, 12-Point, Std, Chrome, Socket (MPN J5431M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: Metric, 1/2 in Drive Size, 31 mm Socket Size, 12-Point, Std, Chrome, Socket (MPN J5431M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.

More from PROTO

View all PROTO parts →
PROTO Socket: SAE, 1/2 in Drive Size, 13/16 in Socket Size, 12-Point, Std, Black Oxide, Socket (MPN J5426B). Key specifications — attr1204417: PROTO; attr1204392: Black Oxide.
PROTO
PROTO Socket: SAE, 1/2 in Drive Size, 13/16 in Socket Size, 12-Point, Std, Black Oxide, Socket (MPN J5426B). Key specifications — attr1204417: PROTO; attr1204392: Black Oxide.
PROTO Socket: SAE, 1/2 in Drive Size, 7/8 in Socket Size, 6-Point, Std, Chrome, Not Tether Capable (MPN J5428H). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: SAE, 1/2 in Drive Size, 7/8 in Socket Size, 6-Point, Std, Chrome, Not Tether Capable (MPN J5428H). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: Metric, 1/2 in Drive Size, 31 mm Socket Size, 6-Point, Std, Chrome, Not Tether Capable (MPN J5431MH). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: Metric, 1/2 in Drive Size, 31 mm Socket Size, 6-Point, Std, Chrome, Not Tether Capable (MPN J5431MH). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: SAE, 1/2 in Drive Size, 1 1/4 in Socket Size, 12-Point, Deep, Chrome, Socket (MPN J5340). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: SAE, 1/2 in Drive Size, 1 1/4 in Socket Size, 12-Point, Deep, Chrome, Socket (MPN J5340). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: SAE, 1/2 in Drive Size, 29/32 in Socket Size, 12-Point, Std, Chrome, Socket (MPN J5429). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: SAE, 1/2 in Drive Size, 29/32 in Socket Size, 12-Point, Std, Chrome, Socket (MPN J5429). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: Metric, 1/2 in Drive Size, 28 mm Socket Size, 12-Point, Std, Chrome, Socket (MPN J5428M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: Metric, 1/2 in Drive Size, 28 mm Socket Size, 12-Point, Std, Chrome, Socket (MPN J5428M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: Metric, 1/2 in Drive Size, 30 mm Socket Size, 12-Point, Deep, Chrome, Socket (MPN J5330M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: Metric, 1/2 in Drive Size, 30 mm Socket Size, 12-Point, Deep, Chrome, Socket (MPN J5330M). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO Socket: SAE, 1/2 in Drive Size, 1 3/8 in Socket Size, 6-Point, Deep, Chrome, Socket (MPN J5344H). Key specifications — attr1204417: PROTO; attr1204392: Chrome.
PROTO
PROTO Socket: SAE, 1/2 in Drive Size, 1 3/8 in Socket Size, 6-Point, Deep, Chrome, Socket (MPN J5344H). Key specifications — attr1204417: PROTO; attr1204392: Chrome.