| MRC |
Requirement Statement |
Characteristics |
| AASB |
FASTENER LENGTH |
4.500 INCHES NOMINAL |
| CQFM |
HARDNESS RATING |
60.0 ROCKWELL B MINIMUM OVERALL |
| AASU |
HEAD HEIGHT |
0.150 INCHES MINIMUM AND 0.188 INCHES MAXIMUM |
| AASK |
HEAD STYLE |
HEXAGON |
| MATT |
MATERIAL |
STEEL OVERALL |
| CQBC |
MINIMUM TENSILE STRENGTH |
55000 POUNDS PER SQUARE INCH |
| ZZZT |
NONDEFINITIVE SPEC/STD DATA |
1 TYPE AND 1 STYLE AND B GRADE |
| CTYF |
NONMACHINE NOMINAL THREAD DIAMETER |
0.250 INCHES |
| CRGF |
NONMACHINE THREAD STYLE |
GIMLET POINT (TYPE A, AB OR BA) |
| MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
FF-B-561,GRADE B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| AATN |
SHOULDER DIAMETER |
0.237 INCHES MINIMUM FIRST SHOULDER AND 0.260 INCHES MAXIMUM FIRST SHOULDER |
| AATX |
SHOULDER LENGTH |
0.094 INCHES MINIMUM FIRST SHOULDER |
| CWYB |
SHOULDER SHAPE |
ROUND FIRST SHOULDER |
| AATB |
WIDTH BETWEEN FLATS |
0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
| STDC |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION |
ASTM A153-60 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SFTT |
SURFACE TREATMENT |
ZINC OVERALL |
