| THREAD SERIES DESIGNATOR | UNC LEFT EXTERNAL |
| THREAD SERIES DESIGNATOR | UNC RIGHT INTERNAL |
| CROSS-SECTIONAL SHAPE | HEXAGON |
| LENGTH | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 303 OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SPACER HEX, CRES STEEL |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.138 INCHES RIGHT INTERNAL |
| NOMINAL THREAD SIZE | 0.138 INCHES LEFT EXTERNAL |
| RIGHT PROJECTION DIAMETER | 0.138 INCHES NOMINAL |
| RIGHT PROJECTION LENGTH | 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM |
| STYLE DESIGNATOR | LEFT INTERNAL AND RIGHT EXTERNAL THREAD |
| THREAD LENGTH | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM RIGHT INTERNAL |
| THREAD CLASS | 2A LEFT EXTERNAL |
| THREAD CLASS | 2B RIGHT INTERNAL |
| THREAD DIRECTION | RIGHT-HAND LEFT EXTERNAL |
| THREAD DIRECTION | RIGHT-HAND RIGHT INTERNAL |
| THREAD LENGTH | 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM LEFT EXTERNAL |
| THREAD QUANTITY PER INCH | 32 LEFT EXTERNAL |
| THREAD QUANTITY PER INCH | 32 RIGHT INTERNAL |