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OTC Locknut Socket: 3/4 in Drive Size, 5 1/4 in Socket Size, 6-Point, Deep - SAE Lock Nut Sockets
OTCSAE Lock Nut Sockets

OTC Locknut Socket: 3/4 in Drive Size, 5 1/4 in Socket Size, 6-Point, Deep

The OTC Locknut Socket (MPN 1939) is a deep, 6-point SAE lock nut socket with a 3/4 in drive size and 5 1/4 in socket size. It features an unfinished surface finish and is not tether capable.

SKU 3G-OTH-329049

Brand
OTC
Item
Locknut Socket: 3/4 in Drive Size, 5 1/4 in Socket Size, 6-Point, Deep
Category
SAE Lock Nut Sockets
Available to Order
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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.

Technical Specifications

OTC
Manufacturer Part Number
1939
Type
6-Point, Deep, Unfinished
Socket Size
5 1/4 in

Technical Documents

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

Product Description

The OTC Locknut Socket (MPN 1939) is a deep, 6-point SAE lock nut socket with a 3/4 in drive size and 5 1/4 in socket size. It features an unfinished surface finish and is not tether capable.

Frequently Asked Questions

What is the OTC Locknut Socket 1939 used for?

The OTC Locknut Socket 1939 is used for tightening or loosening SAE lock nuts in heavy equipment and automotive applications. Its deep, 6-point design provides secure engagement on lock nuts, making it suitable for suspension, axle, and drivetrain work where standard sockets may not reach.

What are the specifications of the OTC Locknut Socket 1939?

The OTC Locknut Socket 1939 has a 3/4 in drive size and a 5 1/4 in socket size. It is a deep, 6-point SAE lock nut socket with an unfinished surface finish. It is not tether capable. The manufacturer part number is 1939, and it is made by OTC.

Where to buy the OTC Locknut Socket 1939 worldwide?

You can source the OTC Locknut Socket 1939 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 provide this OTC socket to procurement teams and maintenance shops globally.

How to select the correct OTC locknut socket for my application?

To select the correct OTC locknut socket, match the drive size (3/4 in) and socket size (5 1/4 in) to your lock nut dimensions. Ensure the socket is deep enough for the nut's reach and that the 6-point design fits the fastener. Verify the application requires an SAE socket, and confirm tether capability is not needed.

Used in

Common applications for OTC
Automotive repair — OTC bearing splitters (model 1124) for removing bearings from transmission shafts
Heavy equipment maintenance — OTC hydraulic electric pump (model 4044) for powering hydraulic cylinders in press applications
Truck wheel service — OTC Budd Wheel Socket (MPN 1948A) for removing and installing lug nuts on commercial vehicles
Industrial assembly — OTC lock nut sockets (MPN 1939) for tightening SAE lock nuts on machinery
Agricultural equipment repair — OTC puller set (model 4518) for extracting gears and pulleys from tractor components
Construction equipment maintenance — OTC drive socket set (MPN 4542) for servicing metric and SAE fasteners on excavators

OTC Products

3G Electric supplies OTC sae lock nut sockets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
OTC Locknut Socket: 3/4 in Drive Size, 3 1/8 in Socket Size, 8-Point, Deep, Unfinished (MPN 1935)
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OTC Locknut Socket: 3/4 in Drive Size, 3 1/8 in Socket Size, 8-Point, Deep, Unfinished (MPN 1935)
OTC Locknut Socket: 3/4 in Drive Size, 4 1/2 in Socket Size, 8-Point, Deep, Unfinished (MPN 1938)
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OTC Locknut Socket: 3/4 in Drive Size, 4 1/2 in Socket Size, 8-Point, Deep, Unfinished (MPN 1938)
OTC Locknut Socket: 3/4 in Drive Size, 2 3/4 in Socket Size, 8-Point, Deep, Unfinished (MPN 1937)
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OTC Locknut Socket: 3/4 in Drive Size, 2 3/4 in Socket Size, 8-Point, Deep, Unfinished (MPN 1937)
OTC Locknut Socket: 3/4 in Drive Size, 4 1/8 in Socket Size, 8-Point, Deep, Unfinished (MPN 1940)
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OTC Locknut Socket: 3/4 in Drive Size, 4 1/8 in Socket Size, 8-Point, Deep, Unfinished (MPN 1940)
OTC Locknut Socket: 3/4 in Drive Size, 3 1/8 in Socket Size, 6-Point, Deep, Unfinished (MPN 1934)
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OTC Locknut Socket: 3/4 in Drive Size, 3 1/8 in Socket Size, 6-Point, Deep, Unfinished (MPN 1934)
OTC Locknut Socket: 3/4 in Drive Size, 3 13/16 in Socket Size, 8-Point, Deep, Unfinished (MPN 1927)
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OTC Locknut Socket: 3/4 in Drive Size, 3 13/16 in Socket Size, 8-Point, Deep, Unfinished (MPN 1927)

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