Part number 66310 is a pair of stainless steel thru-frame fittings designed for routing brake, fuel, or transmission lines through frame rails in custom builds. Each fitting features a male 3 AN inlet and a female 1/8″ NPT outlet with a 2-3/8″ body length, making them suitable for frames up to 2-3/8″ thick. Constructed from 303 stainless steel, these fittings provide a secure, corrosion-resistant solution for clean chassis plumbing.

• Thread type: 3 AN male to 1/8″ NPT female
• Body length: 2-3/8″
• Material: 303 stainless steel
• Quantity: Two fittings (pair)
• Frame compatibility: Fits 2-3/8″ thick rails
• Features: Flush mount design, corrosion-resistant, ideal for fluid line routing