| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.2500 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.445 INCHES MINIMUM AND |
| 0.465 INCHES MAXIMUM |
| FASTENER LENGTH | 1.017 INCHES MINIMUM AND |
| 1.047 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4140 OR |
| STEEL COMP 4340 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS6382 INTERNATIONAL STD/SPEC ALL MATERIAL RESPONSES OR |
| AMS6415 INTERNATIONAL STD/SPEC ALL MATERIAL RESPONSES OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-416, TYPE II, CLASS 2 INTERNATIONAL STD/SPEC ALL TREATMENT RESPONSES OVERALL |
| MINIMUM TENSILE STRENGTH | 6980 POUNDS PER SQUARE INCH |
| HEAD STYLE | SPLINE EXTENDED WASHER |
| HEAD HEIGHT | 0.240 INCHES MINIMUM AND |
| 0.260 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.460 INCHES MINIMUM AND |
| 0.470 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.026 INCHES MINIMUM AND |
| 0.046 INCHES MAXIMUM |
| HEAD MINOR DIAMETER | 0.235 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
| CHAMFER ANGLE | 30.0 DEGREES NOMINAL AND |
| 45.0 DEGREES NOMINAL |
| GRIP LENGTH | 0.552 INCHES MINIMUM AND |
| 0.572 INCHES MAXIMUM |
| GRIP DIAMETER | 0.2485 INCHES MINIMUM AND |
| 0.2495 INCHES MAXIMUM |
| SPECIAL FEATURES | ALLOY STEEL- 4140 (UNS G41400) PER AMS6382, 4340 (UNS G43406) PER AMS6415 OR AMS6484, 8740 (UNS G87400) PER AMS6322, AMS6325 OR AMS6327, OR 6150 (UNS G61500) PER AMS6448. DOUBLE SHEAR STENGTH LBF MIN: 10600. |
| SPECIFICATION/STANDARD DATA | 80205-NASM21134 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, TENSION, STEEL, 180 KSI FTU, 450 F EXTERNAL WRENCHING, SPLINE DRIVE, FLANGED |