This standard practice defines the criteria and requirements inmillimeters for gaging the head protrusion values for: (a) 100ºflush head metric fasteners (based upon the NA0038 Metric PartStandard). (b) 100º reduced crown head fasteners (based upon theNA0123 Metric Part Standard).
This standard practice includes specifications for gage blocks,gage diameters, gage balls, and stylus configurations to be used inthe measurement of the head protrusion values for various 100ºflush head and reduced crown head metric fastener diameter sizesand the method for verifying the wear factor of the gage diametersin the gage blocks.
Recommendations for improvement and/or corrections to thisstandard practice document should be directed to a representativeof the National Aerospace Standards Committee (NASC) or to theNational Aerospace Standards Committee at the address in the marginof the document.
This standard practice takes precedence over documentsreferenced herein.
Referenced specifications herein, of issue in effect on the dateof price inquiry, are a part of this standard practice to theextent indicated. In the case of conflict, requirements hereinshall take precedence.
This standard practice defines a “C=0” plan for sampleinspection lots, from each manufacturing lot, to be used in thehead protrusion measurement of 100º flush head and reduced crownhead metric fasteners.
The fastener head angle shall be verified using a comparator andthe actual head diameter shall be measured using a comparator or amicrometer. The theoretical sharp head diameter, the head heightand the head land, if tabulated, are for engineering reference dataonly and not subject to inspection unless otherwise specified inthe part standard.
- Edition:
- 3
- Published:
- 08/31/2012
- Number of Pages:
- 5
- File Size:
- 1 file , 120 KB
Reviews
There are no reviews yet.