OTC 4CLT4 3/4 in Drive 2-5/8 in 6-Point Deep SAE Locknut Socket
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The OTC 4CLT4 is a new, heavy-duty 6-point deep locknut socket designed for removing and installing large locknuts on heavy truck and equipment axle spindles, wheel bearings, and similar assemblies. It features a 3/4 in square drive and a 2-5/8 in (SAE) 6-point opening geometry machined to engage locknut flats precisely, reducing the risk of rounding under high torque. The socket body has a flared, bell-shaped profile visible in the photos — wider at the socket end than at the drive end — which provides clearance over protruding spindle threads and hub hardware typical in commercial vehicle and agricultural axle service. Finished in a black oxide coating for corrosion resistance, the socket is manufactured in the USA with globally sourced components as stated on the OTC label. OTC part number 4CLT4 is listed by OTC Tools (Bosch Automotive Service Solutions) for use with 3/4 in drive impact or hand ratchet equipment.
Product Specifications
| Brand | OTC |
| MPN | 4CLT4 |
| Drive Size | 3/4 in |
| Socket Size | 2-5/8 in |
| Point Count | 6-Point |
| Socket Depth | Deep |
| Measurement System | SAE (Inch) |
| Finish | Black Oxide |
| Country of Origin | Made in USA w/ globally sourced components |
| Body Style | Flared/bell-shaped (stepped OD) |
| Condition | New |