Inside Calipers — IMPA 650151-650162

Inside calipers in this IMPA 650151-650162 series are used aboard cargo ships, container vessels, tankers, offshore support vessels, and in shipyard workshops for measuring the internal diameter of pipes, pipe fittings, flanges, and machined bores. The spring-loaded legs transfer the bore measurement to an outside micrometer or steel rule, making them a practical go-to tool for chief engineers, fitters, and engine-room ratings checking wear, ovality, or replacement fit on fuel, lube, cooling, and hydraulic lines. They are equally at home in the engine room, on deck during pipe renewal, or in the workshop stores.

Each caliper is forged from hardened steel, with the contact tips tempered to resist wear and retain accuracy after repeated use in the marine environment. The legs are adjusted by a knurled nut and spring, allowing firm setting on the bore without slipping; a light oil film is normally enough to keep the pivot smooth in humid or salt-laden air. The series covers 12 individual IMPA-coded sizes, from 650151 through 650162, so purchasing officers can order exactly the reach and capacity required without buying a full set. Every code in the range is stocked and priced individually, and the tools are supplied with a protective finish to reduce corrosion during storage and transit.

ALL-K MARINE Ship Store (trading as ALL-K MARINE CO., LTD) is a China-based wholesale and retail supplier of IMPA-coded marine stores and ship supplies. We hold the full IMPA 65 measuring tool range and offer competitive wholesale and retail pricing on all 12 inside caliper codes, with supplier QC inspection before dispatch. Quotes are returned within 24 hours, and we ship worldwide through established freight forwarders. On request, we can deliver to your local ship agent for onward transfer to the vessel; please note we do not arrange direct alongside or dock delivery.