ISO 3353-1:2020
Aerospace — Lead and runout threads — Part 1: Rolled external threads
This document specifies the lead and runout requirements for rolled external threads for aerospace construction, and the inspection method to be used in case of dispute.
It is applicable whenever it is referenced in a definition document.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols for threads
5 Requirements
5.1 General requirements
5.2 Lead threads
5.3 Runout threads
5.3.1 Normal shank
5.3.2 Pitch diameter shank
5.3.3 Stepped shank
5.3.4 Screws threaded to the head and bolts threaded to a shoulder
5.3.5 Oversized bolts
6 Inspection method
6.1 General
6.2 Use of the charts
6.3 Procedure
6.3.1 For lead threads
6.3.2 For runout threads
Annex A (informative) Comments on inspection method
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols for threads
5 Requirements
5.1 General requirements
5.2 Lead threads
5.3 Runout threads
5.3.1 Normal shank
5.3.2 Pitch diameter shank
5.3.3 Stepped shank
5.3.4 Screws threaded to the head and bolts threaded to a shoulder
5.3.5 Oversized bolts
6 Inspection method
6.1 General
6.2 Use of the charts
6.3 Procedure
6.3.1 For lead threads
6.3.2 For runout threads
Annex A (informative) Comments on inspection method