PROTO Socket: Metric, 3/8 in Drive Size, 21 mm Socket Size, 12-Point, Deep, Chrome
The PROTO Socket: Metric (SKU J5021M-TT, MPN J5021M-TT) is a tether-ready hand socket with a 3/8 in drive size, 21 mm socket size, 12-point deep configuration, and a chrome finish. It is manufactured by PROTO.
SKU 3G-OTH-328644
Also listed as: J5021MTT · J5021M TT
Local availability & support
- 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.
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Product Description
The PROTO Socket: Metric (SKU J5021M-TT, MPN J5021M-TT) is a tether-ready hand socket with a 3/8 in drive size, 21 mm socket size, 12-point deep configuration, and a chrome finish. It is manufactured by PROTO.
Frequently Asked Questions
What is the PROTO J5021M-TT socket used for?
The PROTO J5021M-TT is a tether-ready hand socket used for tightening or loosening metric fasteners. Its 21 mm, 12-point deep design suits recessed or extended bolts in automotive, industrial, and maintenance applications. The chrome finish resists corrosion, and the tether-ready feature helps prevent tool drops in elevated or confined workspaces.
What are the specifications of the PROTO J5021M-TT socket?
The PROTO J5021M-TT socket has a 3/8 in drive size, 21 mm socket size, and a 12-point deep configuration. It features a chrome finish and is tether-ready. The manufacturer part number is J5021M-TT, and the SKU is 24AH44. This metric socket is designed for professional use and is manufactured by PROTO.
Where to buy the PROTO J5021M-TT socket worldwide?
You can source the PROTO J5021M-TT socket worldwide through 3G Electric, a global industrial equipment distributor established in 1990. 3G Electric handles full logistics, customs clearance, and delivery to your location. Contact 3G Electric for availability and lead time on this PROTO tether-ready socket.
How to select the correct PROTO socket for a job?
To select the correct PROTO socket, match the drive size (e.g., 3/8 in) to your ratchet, and choose a socket size (e.g., 21 mm) that fits the fastener head. For recessed bolts, use a deep socket like the J5021M-TT. A 12-point design works on hex and double-square fasteners. Tether-ready sockets help prevent tool loss at height.
Used in
Common applications for PROTOPROTO Products
3G Electric supplies PROTO tether-ready hand sockets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
