Afa Industries AFA Industries Seal O-Ring 5H7153 Part No: 5H7153

The AFA Industries 5H7153 Silicone Seal O‑Ring is manufactured to match Cat OEM part 5H‑7153, supporting static sealing in low-to-moderate pressure applications on engines such as 3116, 3304, 3306, 3406 (A/B/C/E), 3412, C15, C18, and C27. Conforming to Dash‑322 specifications, it has a precise 31.12 mm (1.23″) inside diameter and 5.33 mm (0.21″) cross-section, molded from high-quality VMQ silicone (Shore 70A), rated from –50 °F to 300 °F. This material is compatible with engine oil and oxygen but should not contact diesel fuel, coolant, or urea. With a packaged weight of just ≈0.01 lb, this ring offers reliable sealing in static applications like injector tube seals or regulator housings. Available through distributors such as Interstate-McBee (M‑5H7153) and Reliance Power Products (H5H7153), this O‑ring delivers OEM fit at aftermarket value.