| FASTENER LENGTH | 2.156 INCHES NOMINAL2.156 INCHES NOMINAL |
| HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.531 INCHES MINIMUM AND 0.531 INCHES MINIMUM AND 0.562 INCHES MAXIMUM0.562 INCHES MAXIMUM |
| HEAD HEIGHT | 0.188 INCHES NOMINAL0.188 INCHES NOMINAL |
| HEAD STYLE | FLAT CHAMFERFLAT CHAMFER |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.375 INCHES0.375 INCHES |
| RIB LENGTH | 0.594 INCHES MINIMUM AND 0.594 INCHES MINIMUM AND 0.625 INCHES MAXIMUM0.625 INCHES MAXIMUM |
| RIB MAJOR DIAMETER | 0.382 INCHES MINIMUM AND 0.382 INCHES MINIMUM AND 0.400 INCHES MAXIMUM0.400 INCHES MAXIMUM |
| RIB QUANTITY | 2222 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A3A |
| THREAD DIRECTION | RIGHT-HANDRIGHT-HAND |
| THREAD LENGTH | 1.094 INCHES MINIMUM1.094 INCHES MINIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 2424 |