OTC 4543A Locknut Socket Set, Chrome Vanadium Steel, 6-Piece 1/2 Inch Drive
- The OTC 4543A Locknut Socket Set is a 6-piece tool kit designed for servicing 4-wheel drive spindle nut and locknut applications on SUVs and light trucks. Each socket is constructed from durable chrome vanadium steel for long service life.
- Features:
- Made from chrome vanadium steel for superior strength and durability
- 1/2 inch square drive fits torque wrenches, ratchets, and breaker bars
- Includes a dedicated FWD front spindle puller socket for hub and spindle servicing
- Covers early "4-slot" locknuts as well as 4-lug and 6-lug configurations for broad compatibility
- Includes:
- 4543A-1: Toyota 4-lug locknut socket (for high-torque free-wheel hubs)
- 4543A-2: Ford 4-lug locknut socket (for F-250, F-350, Dana 80 rears)
- 4543A-3: 4-lug socket for 4-slot front axle locknuts (F-Series, Bronco, Ranger, Dodge)
- 4543A-4: 6-lug socket for heavy-duty 4WD front axles (¾-ton and 1-ton trucks)
- 4543A-5: 4-lug socket for post-1990 trucks and SUVs with manual hubs
- 4543A-6: FWD front spindle puller socket (fits spindle threads 2-16, 1-5/8-16, and 38 mm-1.5)
- Specifications:
- Manufacturer: OTC (Bosch Automotive Service Solutions)
- Part Number: 4543A
- Material: Chrome vanadium steel
- Drive Size: 1/2 inch square drive
- Piece Count: 6 sockets
- Application: Designed for servicing 4WD spindle nuts, locknuts, and front hub assemblies on SUVs and light trucks
OTC, part of Bosch Automotive Service Solutions, developed the 4543A Locknut Socket Set for professionals working on 4WD hub and locknut systems. With six precision-machined sockets made from chrome vanadium steel, it provides strength, coverage, and reliability across multiple vehicle types.
Q: What is included in this socket set?
A: The set includes six sockets: Toyota 4-lug, Ford 4-lug, general 4-lug, 6-lug, post-1990 4-lug, and an FWD spindle puller socket.
Q: What is the drive size?
A: All sockets use a 1/2 inch square drive compatible with torque wrenches, ratchets, or breaker bars.
Q: What thread sizes can the FWD spindle puller socket handle?
A: It fits spindle thread sizes 2-16, 1-5/8-16, and 38 mm-1.5.
