| FASTENER LENGTH | 1.155 INCHES MINIMUM AND 1.160 INCHES MAXIMUM |
| FEATURES PROVIDED | CASEHARDENED |
| HARDNESS RATING | 498.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 560.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM OVERALL |
| HEAD HEIGHT | 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| MATERIAL DOCUMENT AND CLASSIFICATION | STA5,V 18A,K3339 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| POINT DIAMETER | 0.265 INCHES MINIMUM AND 0.270 INCHES MAXIMUM |
| POINT LENGTH | 0.160 INCHES MINIMUM AND 0.170 INCHES MAXIMUM |
| POINT STYLE | DOG |
| WIDTH BETWEEN FLATS | 0.5545 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DEF.29,CLASS 1,K3339 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| THREAD CLASS | 1A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.820 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 24 |