| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.2500 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.425 INCHES NOMINAL |
| FASTENER LENGTH | 0.9875 INCHES NOMINAL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 NATIONAL STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HEAD STYLE | FLAT COUNTERSUNK |
| HEAD DIAMETER | 0.455 INCHES MINIMUM |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND |
| 101.0 DEGREES MAXIMUM |
| GRIP LENGTH | 0.5625 INCHES NOMINAL |
| GRIP DIAMETER | 0.2479 INCHES MINIMUM AND |
| 0.2485 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 81205-BACB30LR PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,100 DEG HEAD,CROSS RECESS,LONG THD.,CLOSE TOL.,SELF-LOCKING AND NONLOCKING |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81205 |
| MFR SOURCE CONTROLLING REFERENCE | BACB30LR4-9-9Y |