Almost nothing in industrial distribution starts as a category search. It starts as a string: a manufacturer part number, a cross-reference from a competitor's catalog, or a spec written out longhand because the plate on the equipment is unreadable. The person typing it is a maintenance supervisor, a purchasing agent or a shop foreman, and the query is a lookup, not a comparison. Whoever owns that string in the index gets the order, which is why catalog depth is a marketing asset here and not just an inventory problem.
The buying process then splits in a way consumer retail never does. The person who needs the part is rarely the person authorized to spend, so the site has to serve a technical searcher and a procurement approver from the same page: fitment and specification for one, terms, tax exemption, purchase orders and net billing for the other. A quote flow that captures both readers is worth more than any amount of homepage polish.
Seasonality follows the plant calendar rather than the retail one. Turnaround and shutdown windows generate concentrated bursts of consumables and spares demand, and the closing weeks of a fiscal year push budget-flush purchasing that has to be spent or lost. Meanwhile the national catalog houses outrank everyone on generic terms, so the winnable ground is the intersection of specific part data, local same-day availability, and a contractor or fleet relationship the big houses do not staff for.