This Nylon Insert Lock Nut has a diameter of 3/8" with a thread size of 16. It is made from steel with a zinc finish and it can be used on several Miller truck assemblies. These include Century Carriers, Century Wreckers, Challenger Wreckers, Champion Wreckers, Holmes Carriers, Holmes Wrecker, and Vulcan Wreckers. Please see the brochure tab for a list of breakdowns. This part can be used to replace Part Number 12-0400390.

• Miller Part Number: 0400398
• Diameter: 3/8"
• Thread Size: 16
• Thickness: 0.281"
• Wrench Size: 9/16"
• Made from steel with a zinc finish
  
  Fits:
• 2001-2004 Century 10 Series Steel & Aluminum Carriers
• 2002-2005 Century 15 Series Steel & Aluminum Carriers
• 1998-Current Century Express 300 Series Wreckers
• 1999-Current Century EB4 Express Wreckers
• 1998-Current Century EB4 6500 Wreckers
• 2007-Current Century Express 300 Series Modular Wreckers
• 2000-Current Century Midnight Express Wreckers
• 2010-Current Century Modular Midnight Express Wreckers
• 2010-Current Century Modular 211 Wreckers
• 2009-Current Century Modular 400 & 600 Wreckers
• 1998-Current Challenger Express 4300 Series Wreckers
• 1995-Current Challenger 4700 Series Wreckers
• 1996-Current Challenger 6807 T50 Wreckers
• 2001-2005 Champion Steel & Aluminum 19'-21' Carriers
• 2001-Current Holmes 10 Series Steel & Aluminum Carriers
• 1994-Current Holmes 440 Series/DFT 400 Wreckers
• 2009-Current Holmes 440SL Wreckers
• 1994-Current Holmes HP 552/DFT 650 Wreckers
• 2010-Current Holmes 600R Wreckers
• 2010-Current Vulcan Modular 804 Wreckers
• 2010-Current Vulcan Modular 806 Wreckers
• 2007-Current Vulcan Modular 807 Wreckers
• 2000-Current Vulcan 806 Wreckers
• 1999-Current Vulcan 807 Auto Grip Wreckers
• 2000-Current Vulcan 810 Intruder Wreckers
• Product Dimensions: 0.55"L x 0.62"W x 0.28"L
• Inside Diameter: 0.32"