PROTO Socket: Metric, 1/2 in Drive Size, 21 mm Socket Size, 6-Point, Std, Chrome
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
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
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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.
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 PROTOPROTO 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.
