This specification defines the inspection criteria and requirements for gaging the head protrusion values
53GP
for 100" flush head fasteners an1d0 0" flush head rivets
AIA/NAS NAS 9800-1998 history
2008AIA/NAS NAS 9800-2008 HEAD PROTRUSION GAGING, 100?FLUSH HEAD FASTENERS, GAGE BLOCK, GAGE DIAMETERS AND STYLUS Rev 1
1998AIA/NAS NAS 9800-1998 Head Protrusion Gaging 100 Degree Flush Head Fasteners Gage Block, Gage Diameters, and Stylus FSC 53GP