ISO 12257:2008
Aerospace - Internal six-lobe drives - Metric series

Standard No.

ISO 12257:2008

Release Date

2008

Published By

International Organization for Standardization (ISO)

Latest

ISO 12257:2008

Scope

This International Standard specifies the dimensions of metric internal six-lobe drives used in metric screws in nominal thread diameter range 3 mm to 20 mm. NOTE Pending publication of an International Standard relating to limit gauges, special care is required to ensure that the dimensions and tolerances specified in this International Standard are confirmed by alternative means

ISO 12257:2008 Referenced Document

• ISO 1101 Geometrical product specifications (GPS) - Geometrical tolerancing - Tolerances of form, orientation, location and run-out*， 2017-02-01 Update

ISO 12257:2008 history

• 2008 ISO 12257:2008 Aerospace - Internal six-lobe drives - Metric series