| MRC |
Requirement Statement |
Characteristics |
| AATC |
EXTENDED WASHER DIAMETER |
0.513 INCHES MINIMUM AND 0.531 INCHES MAXIMUM |
| AATD |
EXTENDED WASHER THICKNESS |
0.019 INCHES MINIMUM AND 0.028 INCHES MAXIMUM |
| AASB |
FASTENER LENGTH |
0.720 INCHES MINIMUM AND 0.750 INCHES MAXIMUM |
| CQFM |
HARDNESS RATING |
22.0 ROCKWELL C MINIMUM OVERALL AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| AASU |
HEAD HEIGHT |
0.204 INCHES MINIMUM AND 0.222 INCHES MAXIMUM |
| AASK |
HEAD STYLE |
HEXAGON EXTENDED WASHER |
| MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATT |
MATERIAL |
STEEL COMP 1018 OVERALL OR STEEL COMP 1021 OVERALL OR STEEL COMP 1022 OVERALL |
| CQBC |
MINIMUM TENSILE STRENGTH |
115000 POUNDS PER SQUARE INCH |
| AHYM |
NOMINAL THREAD DIAMETER |
0.250 INCHES |
| FEAT |
SPECIAL FEATURES |
WASHER BEARIN SURFACE SERRATED |
| AATB |
WIDTH BETWEEN FLATS |
0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| SFTT |
SURFACE TREATMENT |
ZINC OVERALL |
| AAJD |
THREAD CLASS |
2A |
| AAJF |
THREAD DIRECTION |
RIGHT-HAND |
| AASA |
THREAD LENGTH |
0.670 INCHES MINIMUM AND 0.750 INCHES MAXIMUM |
| CMLP |
THREAD QUANTITY PER INCH |
20 |
| THSD |
THREAD SERIES DESIGNATOR |
UNC |
