thread size
The designation of the threaded centre hole a spin-on filter screws onto — 3/4-16 UNF, M20 x 1.5, 1-14. A governed token and NOT a free literal: a designation recurs across thousands of distinct parts (3/4-16 on the WIX 51521 and the 57035 alike, M20 x 1.5 on the WIX 33390 and the Donaldson P550048 alike) and every filter catalogue offers it as a search facet, which is the recurrence test [L11] — a categorical fact is always a token, and the openness of the designation space is content debt [L13], not a licence for free text. It is a dimension of the part itself and not a fitment: nothing about the thread changes when a vehicle model is discontinued. Unstated on a cartridge, a panel or a cone, which have no thread. Distinct from the spine's `diameter`, which is the body's own size — WIX publishes both for the 51521, thread 3/4-16 and outside diameter 93 mm.
Thread size is answered with one word chosen from the thread sizes list — the same word shared across every product that uses it.
It belongs to measurement — its measurable, physical facts.
asked by the kinds that answer it
2 kinds answer it, each for a single value. The same question can be reused by unrelated kinds — one meaning, many homes.
asked by kinds that answer it
The same question can be reused by unrelated kinds — one meaning, many homes.
| kind | how many |
|---|---|
| filter | one |