American Forge & Foundry Locknut Socket 8 Point Part No: 18540

$64.11

The AFF 18540 locknut socket features a precise 4⅛″ 8‑point profile and a welded ¾″ drive plate built for high-torque applications. Forged from high-tensile steel with a powder-coated corrosion-resistant finish and laser-etched part marking for quick ID. Ideal with breaker bars or ratchets, its chamfered edge design ensures smooth engagement, making it a reliable tool for heavy-duty axle and wheel-bearing maintenance.

Specifications

American Forge & Foundry part 18540 is a professional-grade 4⅛″ (4.125″) 8‑point locknut socket tailored for axle and wheel-bearing nuts on heavy-duty trucks and trailers. Featuring a machine-welded ¾″ drive plate compatible with ratchets, breaker bars, and torque wrenches, it’s designed to handle high torque demands. Constructed from high-tensile steel and finished in durable black powder coating to resist rust, the socket offers longevity under tough conditions. The chamfered entry allows for easy nut alignment, while dual-layer laser etching keeps the part number and size legible even after heavy use. Each tool is precision-engineered, individually bar-coded, and boxed, reflecting AFF’s commitment since 1963 to quality and durability.

Weight

Compatibility

Freightliner Trucks
FLD Series: 1987–2001
Century Class: 1996–2010
Columbia: 2001–2015
Cascadia: 2007–present
M2 106 / M2 112: 2002–present
122SD / 114SD (Severe Duty): 2011–present

Peterbilt Trucks
379: 1987–2007
389: 2007–present
579: 2012–present
386 / 387 / 567: 2005–present
320 (vocational): 1990s–present

Kenworth Trucks
W900: 1961–present
T600: 1985–2007
T660: 2008–2017
T680: 2013–present
T800: 1987–present
C500: 1970s–present

Mack Trucks
R Series: 1966–2005
CH Series: 1988–2007
Vision (CX): 1999–2008
Pinnacle (CXU): 2006–2022
Anthem: 2018–present
Granite: 2001–present
LR (low entry): 2016–present

Volvo Trucks
VN Series: 1996–2006
VNL (Long Haul): 2000–present
VNR (Regional): 2017–present
VHD (Vocational): 2000–present
WIA/WIL Series: 1980s–1996