| NONMACHINE THREAD STYLE | GIMLET POINT (TYPE A, AB OR BA) |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.375 INCHES |
| FASTENER LENGTH | 6.000 INCHES NOMINAL |
| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | FF-B-561,GRADE B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM A153-60 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 60.0 ROCKWELL B MINIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.226 INCHES MINIMUM AND |
| 0.268 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.544 INCHES MINIMUM AND |
| 0.562 INCHES MAXIMUM |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.360 INCHES MINIMUM AND |
| 0.388 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.125 INCHES MINIMUM FIRST SHOULDER |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND |
| 1 STYLE AND |
| B GRADE |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81348 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFB561 |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS16992-551-ZE |