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PROTO J5421MH 1/2" Drive 21 mm 6-Point Chrome Hand Socket - 1/2" Drive Hand Sockets
PROTO1/2" Drive Hand Sockets

PROTO J5421MH 1/2" Drive 21 mm 6-Point Chrome Hand Socket

The PROTO Socket: Metric (MPN J5421MH) is a 1/2" Drive Hand Socket with a 21 mm, 6-point standard socket size. It is constructed from chrome and is not tether capable.

SKU 3G-OTH-317793

Brand
PROTO
Item
J5421MH 1/2" Drive 21 mm 6-Point Chrome Hand Socket
Part Number
J5421MH
Category
1/2" Drive Hand Sockets
Available to Order
Also known as:J5421MHPROTO
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Technical specs
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

PROTO
Manufacturer Part Number
J5421MH
Type
6-Point, Std, Chrome, Not Tether Capable
Socket Size
21 mm
Drive Size
1/2 in

Technical Documents

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

Product Description

The PROTO Socket: Metric (MPN J5421MH) is a 1/2" Drive Hand Socket with a 21 mm, 6-point standard socket size. It is constructed from chrome and is not tether capable.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the PROTO J5421MH socket used for?

The PROTO J5421MH is a 1/2" drive hand socket used for tightening or loosening 21 mm metric fasteners in automotive, industrial, and mechanical maintenance applications. Its 6-point design provides a secure grip on hex nuts and bolts, reducing the risk of rounding.

What are the specifications of the PROTO J5421MH socket?

The PROTO J5421MH is a metric socket with a 1/2" drive size, 21 mm socket size, and 6-point standard configuration. It is made of chrome and is not tether capable. The manufacturer part number is J5421MH, and it is produced by PROTO.

Where to buy the PROTO J5421MH socket worldwide?

You can source the PROTO J5421MH socket through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this PROTO socket.

How to select the correct PROTO socket for a 21 mm fastener?

To select the correct PROTO socket for a 21 mm fastener, ensure the drive size matches your ratchet (1/2") and the socket size matches the fastener head (21 mm). A 6-point socket like the J5421MH provides better torque transfer and reduces fastener damage compared to 12-point designs.

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 1/2" 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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