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PROTO Socket Adapter: 3/8 in Output Drive Size, Square, 1 in Overall Lg - 1/4" Drive Hand Socket Adapters
PROTO1/4" Drive Hand Socket Adapters

PROTO Socket Adapter: 3/8 in Output Drive Size, Square, 1 in Overall Lg

The PROTO J5256B Socket Adapter is a 1/4" Drive Hand Socket Adapter with a 3/8 in square output drive size and a 1 in overall length. It features a black oxide finish and does not include a locking mechanism.

SKU 3G-OTH-321416

Brand
PROTO
Item
Socket Adapter: 3/8 in Output Drive Size, Square, 1 in Overall Lg
Category
1/4" Drive Hand Socket Adapters
Available to Order
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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.

Technical Specifications

PROTO
Manufacturer Part Number
J5256B
Type
Square, Black Oxide
Overall Lg
1 in

Technical Documents

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

Product Description

The PROTO J5256B Socket Adapter is a 1/4" Drive Hand Socket Adapter with a 3/8 in square output drive size and a 1 in overall length. It features a black oxide finish and does not include a locking mechanism.

Frequently Asked Questions

What is the PROTO J5256B socket adapter used for?

The PROTO J5256B socket adapter converts a 1/4" drive tool to accept 3/8" drive sockets. It is used in automotive repair, industrial maintenance, and assembly applications where a compact adapter is needed to bridge drive-size gaps.

What are the specifications of the PROTO J5256B socket adapter?

The PROTO J5256B has a 1/4" square input drive and a 3/8" square output drive. Overall length is 1 in. Finish is black oxide. Locking is not included. Manufacturer part number is J5256B.

Where to buy the PROTO J5256B socket adapter worldwide?

3G Electric supplies the PROTO J5256B socket adapter worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote and lead time on this genuine PROTO part.

How to select the right PROTO socket adapter for my tools?

Match the input drive size to your ratchet or driver (1/4" for J5256B) and the output drive size to your sockets (3/8"). Ensure overall length fits your workspace. Black oxide finish resists corrosion. PROTO adapters are widely used in industrial settings.

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 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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