PROTO Flex Socket: 3/8 in Drive Size, 11/16 in Socket Size, 12-Point, Std
The PROTO Flex Socket (MPN J5278A) is a 3/8" Drive SAE Flex Socket with an 11/16" socket size and 12-point standard configuration. It features a chrome finish and is not tether capable.
SKU 3G-OTH-307977
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 Flex Socket (MPN J5278A) is a 3/8" Drive SAE Flex Socket with an 11/16" socket size and 12-point standard configuration. It features a chrome finish and is not tether capable.
Frequently Asked Questions
What is the PROTO Flex Socket J5278A used for?
The PROTO Flex Socket J5278A is used for turning fasteners in tight or awkward spaces where a straight socket cannot reach. Its 3/8" drive and 11/16" 12-point chrome design suits automotive, industrial, and maintenance applications requiring reliable torque transfer.
What are the specifications of the PROTO J5278A flex socket?
The PROTO J5278A is a 3/8" drive SAE flex socket with an 11/16" socket size, 12-point standard configuration, and chrome finish. It is not tether capable. The manufacturer part number is J5278A, and it is made by PROTO.
Where to buy the PROTO J5278A flex socket worldwide?
3G Electric supplies the PROTO J5278A flex socket worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us to order this genuine PROTO socket for your maintenance or production needs.
How to select the correct PROTO flex socket size?
To select the correct PROTO flex socket, match the drive size (3/8") to your ratchet or tool, and the socket size (11/16") to the fastener head. Choose 12-point for square or hex fasteners. The chrome finish resists corrosion. Confirm tether capability if required for safety.
Used in
Common applications for PROTOPROTO Products
3G Electric supplies PROTO 3/8" drive sae flex sockets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
