Marine stores, 50,201 items

The IMPA Marine Stores Guide gives every common ship’s store a six-digit code. The first two digits name the section — 61 is hand tools, 75 is valves and cocks, 33 is safety equipment — and the rest identify one item within it, down to its size, material and unit. A chief engineer who writes 615441 on a requisition means one specific non-sparking wrench, and a supplier in any port reads it the same way.

The sections below open into groups, and the groups into the items themselves, each with its code and the unit it is priced per. Use them to find the codes you need, then post the requirement: it reaches the verified suppliers activated at your port, and their bids come back sealed for you to compare.