| FASTENER LENGTH | 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM |
| HARDNESS RATING | 11.0 ROCKWELL C MINIMUM AND 23.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM |
| HEAD LENGTH | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM |
| HEAD STYLE | TEE NO. 3 |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-633,CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 1035 OR STEEL COMP 1040 OVERALL |
| MINIMUM YIELD STRENGTH | 65000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| WIDTH BETWEEN FLATS | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |