17617 O-RING, VALVE PLUG (BUNA-N)

SKU: 5149

Genuine CAT Pumps o-ring 17617, a 90-durometer Buna-N (NBR) o-ring for valve plugs. CAT's 530 and 550 pump datasheets list it directly above the 43851 chrome valve plug — it is the matching seal for that plug, with six required per pump. Buna-N suits the oil and water exposure at the valve plug seat. Always replace these o-rings when the valve plugs are serviced. Listed as SKU 5149.