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PROTO Universal Joint: 1/4 in Input Drive Size, 1/4 in Output Drive Size, Square - 1/4" Drive Hand Flex Socket Adapters
PROTO1/4" Drive Hand Flex Socket Adapters

PROTO Universal Joint: 1/4 in Input Drive Size, 1/4 in Output Drive Size, Square

The PROTO Universal Joint (MPN J4770A) is a 1/4" Drive Hand Flex Socket Adapter with a square drive design. It features a 1/4 in input and output drive size, constructed from chrome. This adapter does not include a…

SKU 3G-OTH-310883

Brand
PROTO
Item
Universal Joint: 1/4 in Input Drive Size, 1/4 in Output Drive Size, Square
Category
1/4" Drive Hand Flex Socket Adapters
Available to Order
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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

Technical Specifications

PROTO
Manufacturer Part Number
J4770A
Type
Square, Chrome
Output Drive Size
1/4 in

Technical Documents

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

Product Description

The PROTO Universal Joint (MPN J4770A) is a 1/4" Drive Hand Flex Socket Adapter with a square drive design. It features a 1/4 in input and output drive size, constructed from chrome. This adapter does not include a locking mechanism.

Frequently Asked Questions

What is the PROTO Universal Joint J4770A used for?

The PROTO Universal Joint J4770A is used to transfer torque at an angle between a ratchet or driver and a socket, allowing access to fasteners in confined or offset positions. It is commonly applied in automotive repair, machinery maintenance, and assembly work where straight-line access is not possible.

What are the specifications of the PROTO Universal Joint J4770A?

The PROTO Universal Joint J4770A has a 1/4 in input and output drive size, a square drive type, and is made of chrome. It does not include a locking mechanism. The manufacturer part number is J4770A, and it is classified as a 1/4" Drive Hand Flex Socket Adapter.

Where to buy the PROTO Universal Joint J4770A worldwide?

You can source the PROTO Universal Joint J4770A 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; we supply this item as part of our extensive sourcing network.

How to select the correct universal joint for a 1/4 in drive system?

To select the correct universal joint for a 1/4 in drive system, match the input and output drive size to your ratchet or driver—here 1/4 in square. Consider the material (chrome for corrosion resistance) and whether a locking feature is needed. The PROTO J4770A is a non-locking chrome option suitable for general use.

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

PROTO Products

3G Electric supplies PROTO 1/4" drive hand flex socket adapters. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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PROTO Universal Joint: 1/4 in Input Drive Size, 1/4 in Output Drive Size, Square, Black Oxide (MPN J4770AB)
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