| NONMACHINE THREAD STYLE | GIMLET POINT (TYPE A, AB OR BA) |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.500 INCHES |
| FASTENER LENGTH | 1.440 INCHES MINIMUM AND |
| 1.500 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A307-68 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 60.0 ROCKWELL B MINIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
| HEAD STYLE | SQUARE |
| HEAD HEIGHT | 0.308 INCHES MINIMUM AND |
| 0.348 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.725 INCHES MINIMUM AND |
| 0.750 INCHES MAXIMUM |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.482 INCHES MINIMUM AND |
| 0.515 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.156 INCHES MINIMUM FIRST SHOULDER |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND |
| 2 STYLE AND |
| B GRADE |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81348 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFB561 |