Hydraulic Puck Caps
Low-profile puck-style caps that seal hydraulic ports flat against the flange face — keeping dirt, moisture and contaminants out while holding oil in during storage, transport, service or lockdown. Fits SAE Code 61, SAE Code 62 and CAT flange ports in sizes #8, #10, #12, #16, #20, #24 and #32, each with an included O-ring for a snug seal.
Molded in high-impact ASA, color-coded by size and stamped with the size number for colorblind-friendly use on the job. Rated −30°C to 105°C (−22°F to 220°F), UV and oil-resistant, built to take drops and impacts without cracking.
Compatible with SAE Code 61, Code 62 and CAT flange ports, in the matching size, on equipment from Caterpillar, Komatsu, John Deere, Volvo CE, Hitachi, Kobelco, Liebherr and Doosan/Develon. The #10 puck cap (SAE Code 61) is a Komatsu-specific size and fits Komatsu equipment only. Not affiliated with or endorsed by these manufacturers.
Sold individually — grab exactly the size you need to restock a kit or replace a lost cap. For a complete set across all sizes, see our Hydraulic Flange Cap Kits.
Designed, tested and made in Canada by a 28-year Master Technician for real field conditions.
Contamination and leak prevention only — not pressure-rated. Not a substitute for a pressure-rated plug or fitting.
