Caliso 305K4 Poly V-Belt K-Section Micro Rib Serpentine Belt 4-Rib 30.5"

The Caliso 305K4 is a K-Section Poly V-Belt (also known as a Micro Rib or serpentine belt) featuring 4 longitudinal V-shaped ribs and a pitch length of 30.5 inches (metric code 4PK0774/4PK775). Constructed with a polyester cord tensile member, this belt delivers reliable power transmission for automotive and light industrial applications.

Key Features:

• Belt Type: K-Section Micro Rib Poly V-Belt (serpentine)
• Pitch Length: 30.5" (775mm) | Outside Circumference: approx. 31.25" (793.75mm)
• Rib Count: 4 ribs
• Thickness: 0.18" | Rib Pitch: 3.56mm (K-Section)
• Material: Polyester cord tensile member with fiber-reinforced undercord rubber
• Color: Black
• Metric Cross-Reference: 4PK0774 / 4PK775
• Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications
• Oil and heat resistant rubber compound for extended service life
• Low-stretch construction resists fatigue and shock loads

Common cross-reference part numbers include Dayco 305K4, Gates K040305, Goodyear 305K4MK, and Durkee-Atwood 305K4, among others. This belt is widely used across automotive alternator, power steering, and accessory drive systems in a broad range of passenger vehicles.