90.93 Standard confirmed Jun 23, 2026
ISO
ISO/TC 22/SC 40 Specific aspects for light and heavy commercial vehicles, busses and trailers
International Standard
43.060.10 Engine block and internal components
Specifies the nominal dimensions and tolerances of flywheel housings, in particular those which affect interchangeability with mating parts. Flywheel housings of size codes 1 to 4 are recommended for commercial vehicles and buses. Some figures illustrate shapes and reference quantities of concern. Applies to reciprocating internal combustion engines except engines for aircraft and passenger cars.
PUBLISHED
ISO 7648:1987
90.93
Standard confirmed
Jun 23, 2026