This standard specifies the technical requirements, inspection methods, inspection rules, marking and packaging of internal combustion engine cylinder head nuts and flywheel nuts. This standard applies to nuts on cylinder head bolts and flywheel bolts of reciprocating internal combustion engines with a cylinder diameter within 200 mm.
JB/T 9765.3-1999 history
2015JB/T 7293.7-2015 Bolts and nuts for internal combustion engines - Part 7: Specifications for cylinder head nuts and flywheel nuts
1999JB/T 9765.3-1999 Internal combustion engines.Cylinder head and flywheel nuts.Specifications
JB/T 9765.3-1999 Internal combustion engines.Cylinder head and flywheel nuts.Specifications has been changed from NJ 67-1978 Specifications for cylinder head nuts and flywheel nuts.
JB/T 9765.3-1999 Internal combustion engines.Cylinder head and flywheel nuts.Specifications was changed to JB/T 7293.7-2015 Bolts and nuts for internal combustion engines - Part 7: Specifications for cylinder head nuts and flywheel nuts.