Threaded PlugThreaded plug offered as an aftermarket replacement; contact us to verify fit before ordering for hydraulic manifolds, transmission housings, and engine block ports on industrial lift trucks. The plug seals an unused port or service opening to keep oil in and contamination out. Service techs replace these whenever the original is rounded off at removal, when the sealing surface is galled, or when a temporary test port needs to be returned to service. Even a small weep at a plug can drop tank levels overnight and trigger a low-oil fault. Quote under AC0901783 and let our parts desk know whether you need NPT, BSP, or metric threads.Aftermarket replacement part, cross-references original part number AC0901783.Need help confirming fit? Call (562) 693-7748 with your serial number.Part number variants: AC0901783, ac0901783 ⚠ Warning: Some equipment has serial-number breaks that may not be reflected in the catalog. Contact us for clarification before ordering if uncertain.SCR Forklift Parts ships from Whittier, CA with next-day delivery available across the US when needed.