- Thread Class
- 2A
- Thread Direction
- Right-hand
- Thread Length
- 0.450 inches minimum and 0.500 inches maximum
- Fastener Length
- 0.500 inches nominal
- Head Style
- Flat countersunk
- Head Diameter
- 0.244 inches minimum and 0.279 inches maximum
- Internal Drive Style
- Cross recess type 1
- Nominal Thread Diameter
- 0.138 inches
- Thread Quantity per Inch
- 40
- Minimum Tensile Strength
- 57000 pounds per square inch
- Countersink Angle
- 80.0 degrees minimum and 82.0 degrees maximum
- Screw Material
- Copper alloy
- Screw Material Document and Classification
- QQ-B-626 fed spec single material response or QQ-W-321 fed spec single material response
- Thread Series Designator
- UNF
Catalogue data is compiled from public DLA/FLIS sources and is provided for
identification. Availability, condition and certification are confirmed on
quotation. OmniSynk Distribution Services is a stocking distributor.