Pai Industries O-Ring Part No: 321390
$3.61
The PAI 321390 O-Ring is a precision aftermarket replacement engineered for Caterpillar part 6V7350 housings. Made of Viton 75 material, it offers heat and chemical resistance in tough diesel applications. Featuring manufacturing to tight tolerances and backed by PAI’s factory 2-Year Warranty, it ensures a reliable, leak-free seal in fuel or coolant systems. Sold by Wofford Truck Parts, it meets or exceeds OE quality.
Specifications
The PAI 321390 O-Ring is a durable, high-performance seal designed to match Caterpillar’s OE 6V7350 specification. Crafted from Viton 75, this O-ring features a cross-section of 0.103 in (2.62 mm) and an inside diameter of 4.487 in (113.97 mm), corresponding to the AS568A-157 size code. Built with exceptional tolerance control, it withstands high temperature and chemical exposure typical in heavy-duty diesel environments. PAI’s manufacturing ensures consistent quality and fitment, and the part is backed by a 2-Year Factory Warranty. Available via Wofford Truck Parts, it's a trusted solution for Caterpillar engine maintenance.
Weight
0.04
Compatibility
Caterpillar 3406E, C15, C16, C18 engines in Class 8 trucks
Freightliner Classic / FLD (late 1980s–early 2000s)
Peterbilt 379, Kenworth W900/T800 (late 1980s–early 2000s)
Mack CH Series with CAT power–plants (1990s–early 2000s)
International 9000/9200/9900 Series (1990s–early 2000s)
Western Star 4800/4900 (1990s–early 2000s)
Alternative Part Numbers
- AS568A-157
- Caterpillar 6V7350
- Interstate-McBee M-6V7350
- PAI 321390
