| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.355 INCHES MINIMUM AND |
| 0.395 INCHES MAXIMUM |
| FASTENER LENGTH | 1.637 INCHES MINIMUM AND |
| 1.667 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 301 OR |
| STEEL COMP 302 OR |
| STEEL COMP 316 SECONDARY WASHER |
| STEEL CORROSION RESISTING PRIMARY WASHER |
| STEEL CORROSION RESISTING SPRING |
| STEEL CORROSION RESISTING STAND-OFF |
| STEEL COMP XM-13 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | FED-STD 66 FED STD ALL MATERIAL RESPONSES SECONDARY WASHER |
| FED-S-STD 66 FED STD ALL MATERIAL RESPONSES PRIMARY WASHER |
| QQ-S-763, 300 SERIES FED SPEC ALL MATERIAL RESPONSES OR |
| AMS 5640, 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE OR |
| ASTM A582, 300 SERIES ASSN STD ALL MATERIAL RESPONSES STAND-OFF |
| AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 175000 POUNDS PER SQUARE INCH |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.090 INCHES MINIMUM AND |
| 0.120 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.305 INCHES MINIMUM AND |
| 0.312 INCHES MAXIMUM |
| SPECIAL FEATURES | 0.250-28UNF-2A THREADS ON SHOULDER; THREADED HEX SLEEVE 0.312 IN. ACROSS FLATS |