| FASTENER LENGTH | 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM |
| HEAD HEIGHT | 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM |
| HEAD STYLE | PAN |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| LOCKING FEATURE | PELLET THREADS |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP E4340 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OR STEEL COMP 4140 OR STEEL COMP 4037 OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3A |
| THREAD LENGTH | 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNF |