olemust
vt vahetatavus

Wiktionary:
1. freely substitutable; that may be swapped at will
Eli Whitney's development of interchangeable parts was a breakthrough for modern manufacturing. Prior to that, each part had to be made custom.

ISO 10795:
kujult, ühtivuselt ja talitluselt identne teise objektiga,
nii et saab kasutada selle asendajana
=
having identical external form, fit, and function with another item, allowing its use as a replacement

vt ka
- kuumvahetatav