740290 O-RING FOR OIL PLUG

SKU: 3393

Genuine AR (Annovi Reverberi) o-ring 740290, the seal used with oil plugs on AR triplex plunger pumps. AR pump breakdowns list ‘AR-740290 Oring’ immediately next to ‘AR-880530 Plug’ on RKV, XMV, and RMW-series models, and it also appears in the AR630TSS unloader exploded view. It is the small seal that keeps oil from weeping past the plug — replace it whenever the plug is removed. Exact dimensions and material were not documented in the sources found. Listed as SKU 3393.