| MATERIAL | ALUMINUM ALLOY 2011 OR | 
 | ALUMINUM ALLOY 6061 OR | 
 | ALUMINUM ALLOY 2024 STANDOFF | 
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE OR | 
 | QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OR | 
 | QQ-A-225/3 FED SPEC SINGLE MATERIAL RESPONSE STANDOFF | 
| CROSS-SECTIONAL SHAPE | HEXAGON | 
| WIDTH ACROSS FLATS | 0.2690 INCHES MINIMUM AND | 
 | 0.3810 INCHES MAXIMUM | 
| STYLE DESIGNATOR | LEFT INTERNAL AND RIGHT INTERNAL THREADS | 
| LENGTH | 0.5580 INCHES MINIMUM AND | 
 | 0.5680 INCHES MAXIMUM | 
| THREAD SERIES DESIGNATOR | UNC LEFT INTERNAL (INCLUDES THRU THREAD) | 
 | UNC RIGHT INTERNAL | 
| NOMINAL THREAD SIZE | 0.1640 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) | 
 | 0.1640 INCHES RIGHT INTERNAL | 
| THREAD QUANTITY PER INCH | 32 LEFT INTERNAL (INCLUDES THRU THREAD) | 
 | 32 RIGHT INTERNAL | 
| THREAD CLASS | 2B LEFT INTERNAL (INCLUDES THRU THREAD) | 
 | 2B RIGHT INTERNAL | 
| THREAD DIRECTION | RIGHT-HAND RIGHT INTERNAL | 
| THREAD LENGTH | 0.4380 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) | 
 | 0.4380 INCHES NOMINAL RIGHT INTERNAL |