| FASTENER LENGTH | 5.286 INCHES MINIMUM AND 5.408 INCHES MAXIMUM |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.908 INCHES MINIMUM AND 0.966 INCHES MAXIMUM |
| HEAD STYLE | SQUARE |
| INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 4032 OR STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL |
| NOMINAL THREAD DIAMETER | 1.250 INCHES |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND 6 STYLE AND 1 1/4 SIZE AND 4 1/2 LENGTH |
| POINT STYLE | HALF DOG |
| SPECIFICATION/STANDARD DATA | 81348-FF-S-210 GOVERNMENT SPECIFICATION |
| WIDTH BETWEEN FLATS | 1.219 INCHES MINIMUM AND 1.250 INCHES MAXIMUM |
| SUPPLEMENTARY FEATURES | APPL NEEDS LOC-WEL LOCKING ELEMENT |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 2A |
| THREAD QUANTITY PER INCH | 7 |
| THREAD SERIES DESIGNATOR | UNRC |