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OTC Locknut Socket: 3/4 in Drive Size, 2 1/2 in Socket Size, 6-Point, Deep - SAE Lock Nut Sockets
OTCSAE Lock Nut Sockets

OTC Locknut Socket: 3/4 in Drive Size, 2 1/2 in Socket Size, 6-Point, Deep

The OTC Locknut Socket (MPN 1921) is an SAE lock nut socket with a 3/4 in drive size and 2 1/2 in socket size. It features a 6-point, deep, unfinished design and is not tether capable.

SKU 3G-OTH-329045

Brand
OTC
Item
Locknut Socket: 3/4 in Drive Size, 2 1/2 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
1921
Type
6-Point, Deep, Unfinished, SAE
Socket Size
2 1/2 in

Technical Documents

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

Product Description

The OTC Locknut Socket (MPN 1921) is an SAE lock nut socket with a 3/4 in drive size and 2 1/2 in socket size. It features a 6-point, deep, unfinished design and is not tether capable.

Frequently Asked Questions

What is the OTC Locknut Socket 1921 used for?

The OTC Locknut Socket 1921 is used for tightening or loosening SAE lock nuts in automotive and industrial applications. Its 6-point, deep design provides secure engagement on hex fasteners, while the 3/4 in drive size suits heavy-duty torque tools. OTC brand sockets are commonly used in vehicle repair and equipment maintenance.

What are the specifications of the OTC Locknut Socket 1921?

The OTC Locknut Socket 1921 has a 3/4 in drive size and a 2 1/2 in socket size. It is a 6-point, deep, unfinished SAE socket. The unfinished surface indicates no coating or plating. It is not tether capable. The manufacturer part number is 1921.

Where to buy the OTC Locknut Socket 1921 worldwide?

You can source the OTC Locknut Socket 1921 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. 3G Electric supplies OTC tools to procurement teams and maintenance professionals internationally.

How to select the correct OTC locknut socket for SAE fasteners?

To select the correct OTC locknut socket, match the socket size to the fastener hex dimension. For SAE lock nuts, use a 6-point deep socket like the 1921 with a 2 1/2 in size. Ensure the drive size (3/4 in) fits your torque wrench or impact gun. Unfinished sockets suit general use without corrosion concerns.

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
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OTC Locknut Socket: 3/4 in Drive Size, 4 3/8 in Socket Size, 6-Point, Deep, Unfinished (MPN 1916)
OTC Locknut Socket: 3/4 in Drive Size, 2 3/4 in Socket Size, 6-Point, Deep, Unfinished, SAE (MPN 1923)
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OTC Locknut Socket: 3/4 in Drive Size, 2 3/4 in Socket Size, 6-Point, Deep, Unfinished, SAE (MPN 1923)
OTC Locknut Socket: 3/4 in Drive Size, 3 3/8 in Socket Size, 8-Point, Deep, Unfinished (MPN 1924)
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OTC Locknut Socket: 3/4 in Drive Size, 3 3/8 in Socket Size, 8-Point, Deep, Unfinished (MPN 1924)

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