| THREAD SERIES DESIGNATOR | UNF | 
| NOMINAL THREAD DIAMETER | 0.190 INCHES | 
| THREAD QUANTITY PER INCH | 32 | 
| THREAD CLASS | 3A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.250 INCHES NOMINAL | 
| FASTENER LENGTH | 0.747 INCHES NOMINAL | 
| MATERIAL | STEEL COMP 301 SECONDARY WASHER | 
 | STEEL CORROSION RESISTING PRIMARY WASHER | 
 | ALUMINUM ALLOY 6061 STAND-OFF | 
 | STEEL CORROSION RESISTING FASTENER | 
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER | 
 | 66 FED STD SINGLE MATERIAL RESPONSE PRIMARY WASHER | 
 | QQ-B-626 COMP 22 FED SPEC SINGLE MATERIAL RESPONSE SPRING | 
 | AMS 6300 ASSN STD SINGLE MATERIAL RESPONSE FASTENER | 
| SURFACE TREATMENT | PASSIVATE SECONDARY WASHER | 
 | PASSIVATE PRIMARY WASHER | 
 | ANODIZE STAND-OFF | 
 | PASSIVATE FASTENER | 
| HEAD STYLE | PAN NO. 2 | 
| HEAD DIAMETER | 0.365 INCHES NOMINAL | 
| HEAD HEIGHT | 0.206 INCHES NOMINAL | 
| INTERNAL DRIVE STYLE | SLOT | 
| MATERIAL ACCOMMODATED THICKNESS | 0.188 INCHES MINIMUM AND | 
 | 0.250 INCHES MAXIMUM |