| SFTT |
SURFACE TREATMENT |
ZINC OVERALL |
| AASL |
HEAD DIAMETER |
0.720 INCHES MINIMUM AND 0.781 INCHES MAXIMUM |
| CQBC |
MINIMUM TENSILE STRENGTH |
160000 POUNDS PER SQUARE INCH |
| CQHQ |
MINIMUM YIELD STRENGTH |
130000 POUNDS PER SQUARE INCH |
| AAJD |
THREAD CLASS |
3A |
| AAUM |
LOCKING FEATURE |
PELLET THREADS |
| ZZZX |
DEPARTURE FROM CITED DESIGNATOR |
AS MODIFIED BY SELF-LOCKING FEATURE |
| AAJF |
THREAD DIRECTION |
RIGHT-HAND |
| STDC |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION |
QQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| AASK |
HEAD STYLE |
FLAT COUNTERSUNK |
| AASB |
FASTENER LENGTH |
0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM |
| ZZZT |
NONDEFINITIVE SPEC/STD DATA |
4 TYPE |
| MATT |
MATERIAL |
STEEL OVERALL |
| AASA |
THREAD LENGTH |
0.375 INCHES MINIMUM AND 0.532 INCHES MAXIMUM |
| CMLP |
THREAD QUANTITY PER INCH |
16 |
| THSD |
THREAD SERIES DESIGNATOR |
UNC |
| ABQZ |
INTERNAL DRIVE STYLE |
HEXAGON |
| CQFM |
HARDNESS RATING |
36.0 ROCKWELL C MINIMUM OVERALL AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| AHYM |
NOMINAL THREAD DIAMETER |
0.375 INCHES |
| CRSQ |
COUNTERSINK ANGLE |
80.0 DEGREES MINIMUM AND 84.0 DEGREES MAXIMUM |
| ASDB |
WIDTH ACROSS FLATS |
0.219 INCHES NOMINAL |
| MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
66 FED STD SINGLE MATERIAL RESPONSE OVERALL |