| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.170 INCHES MINIMUM AND |
| 0.200 INCHES MAXIMUM |
| FASTENER LENGTH | 0.922 INCHES MINIMUM AND |
| 0.952 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 301 SECONDARY WASHER |
| STEEL COMP 302 OR |
| STEEL COMP 304 OR |
| STEEL COMP 305 OR |
| STEEL COMP 384 PRIMARY WASHER |
| STEEL COMP 302 SPRING |
| STEEL COMP 304 STAND-OFF |
| STEEL COMP 316 OR |
| STEEL COMP 384 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| ASTM A580 ASSN STD SINGLE MATERIAL RESPONSE SPRING |
| MIL-S-23195 MIL SPEC SINGLE MATERIAL RESPONSE STAND-OFF |
| SURFACE TREATMENT | OXIDE SECONDARY WASHER |
| OXIDE PRIMARY WASHER |
| PASSIVATE SPRING |
| OXIDE STAND-OFF |
| OXIDE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER |
| MIL-C-13924 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING |
| MIL-C-13924 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE STAND-OFF |
| MIL-C-13924 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER |
| HEAD STYLE | KNURLED NO. 2 |
| HEAD DIAMETER | 0.240 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
| HEAD HEIGHT | 0.097 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATERIAL ACCOMMODATED THICKNESS | 0.126 INCHES MINIMUM AND |
| 0.157 INCHES MAXIMUM |