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PROTO J5021M 3/8" Drive 21 mm 12-Point Deep Chrome Socket - 3/8" Drive Hand Sockets
PROTO3/8" Drive Hand Sockets

PROTO J5021M 3/8" Drive 21 mm 12-Point Deep Chrome Socket

The PROTO Socket: Metric is a 3/8" Drive Hand Socket, model J5021M, featuring a 21 mm socket size with a 12-point deep design. It is constructed from chrome, as specified by the manufacturer PROTO.

SKU 3G-OTH-319167

Brand
PROTO
Item
J5021M 3/8" Drive 21 mm 12-Point Deep Chrome Socket
Part Number
J5021M
Category
3/8" Drive Hand Sockets
Available to Order
Also known as:J5021MPROTO
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

PROTO
Manufacturer Part Number
J5021M
Type
12-Point, Deep, Chrome, Socket
Socket Size
21 mm
Drive Size
3/8 in

Technical Documents

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

Product Description

The PROTO Socket: Metric is a 3/8" Drive Hand Socket, model J5021M, featuring a 21 mm socket size with a 12-point deep design. It is constructed from chrome, as specified by the manufacturer PROTO.

Frequently Asked Questions

What is the PROTO J5021M socket used for?

The PROTO J5021M is a 3/8 in drive, 21 mm, 12-point deep socket designed for turning metric fasteners in industrial maintenance, automotive repair, and assembly applications. Its deep profile reaches recessed nuts and bolts, while the chrome finish resists corrosion.

What are the specifications of the PROTO J5021M socket?

The PROTO J5021M is a 12-point, deep, chrome socket with a 3/8 in drive size and a 21 mm socket size. It is manufactured by PROTO under part number J5021M. The chrome construction provides durability and corrosion resistance for repeated use.

Where to buy the PROTO J5021M socket worldwide?

3G Electric supplies the PROTO J5021M socket to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote and lead time; we source genuine PROTO tools through our global supply network.

How to select the correct PROTO socket size?

To select the correct PROTO socket, match the drive size (3/8 in) to your ratchet or torque wrench, and the socket size (21 mm) to the fastener head. For recessed fasteners, choose a deep socket like the J5021M. Always verify the point configuration (12-point) matches the fastener.

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
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PROTO Products

3G Electric supplies PROTO 3/8" 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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