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PROTO Socket Extension Set: 3/8 in Input Drive Size, 3/8 in Output Drive Size - Impact Socket Extension Sets
PROTOImpact Socket Extension Sets

PROTO Socket Extension Set: 3/8 in Input Drive Size, 3/8 in Output Drive Size

The PROTO Socket Extension Set (MPN J7277A) is an impact socket extension set with a 3/8 in input drive size and a 3/8 in output drive size. It features a black oxide finish and does not include a locking mechanism.

SKU 3G-OTH-405867

Brand
PROTO
Item
Socket Extension Set: 3/8 in Input Drive Size, 3/8 in Output Drive Size
Category
Impact Socket Extension Sets
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Technical Specifications

PROTO
Manufacturer Part Number
J7277A
Type
Black Oxide, Std
Output Drive Size
3/8 in
View Full Spec Sheet

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

Product Description

The PROTO Socket Extension Set (MPN J7277A) is an impact socket extension set with a 3/8 in input drive size and a 3/8 in output drive size. It features a black oxide finish and does not include a locking mechanism.

Frequently Asked Questions

What is the PROTO J7277A socket extension set used for?

The PROTO J7277A socket extension set is used to extend the reach of a ratchet or impact wrench when tightening or loosening fasteners. It is designed for industrial maintenance, automotive repair, and assembly applications where a 3/8 in drive system is required.

What are the specifications of the PROTO J7277A socket extension set?

The PROTO J7277A socket extension set has a 3/8 in input drive size and a 3/8 in output drive size. It features a black oxide finish for corrosion resistance and does not include a locking mechanism. The set is designed for impact use and is manufactured by PROTO.

Where to buy the PROTO J7277A socket extension set worldwide?

You can source the PROTO J7277A socket extension set 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.

How to select the correct socket extension set for impact tools?

To select the correct impact socket extension set, match the drive size (e.g., 3/8 in) to your ratchet or impact wrench. Choose a black oxide finish for durability. Ensure the set is rated for impact use, as standard extensions may crack under high torque. The PROTO J7277A meets these criteria.

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 impact socket extension sets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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PROTO Socket Extension Set: 3/8 in Input Drive Size, 3/8 in Output Drive Size, Full Polish, Std (MPN J52008). Key specifications — attr1204978: Not Insulated; attr1204980: Locking Not Included; attr1204984: PROTO; attr1204970: Full Polish.
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PROTO Socket Extension Set: 3/8 in Input Drive Size, 3/8 in Output Drive Size, Full Polish, Std (MPN J52008). Key specifications — attr1204978: Not Insulated; attr1204980: Locking Not Included; attr1204984: PROTO; attr1204970: Full Polish.
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PROTO Socket Extension Set: 3/8 in Input Drive Size, 3/8 in Output Drive Size, Black Oxide, Std (MPN J7277L). Key specifications — attr1204876: Locking Included; attr1204887: PROTO; attr1204888: Black Oxide.
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