- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.162 inches minimum and 0.202 inches maximum
- Fastener Length
- 0.240 inches minimum and 0.260 inches maximum
- Head Style
- Double hexagon W/ hole
- Head Height
- 0.218 inches nominal
- Width Between Flats
- 0.187 inches nominal
- Extended Washer Diameter
- 0.270 inches nominal
- Extended Washer Thickness
- 0.030 inches minimum
- End Item Identification
- W/s: engine, aircraft TF-34
- Nominal Thread Diameter
- 0.138 inches
- Thread Quantity per Inch
- 40
- Minimum Tensile Strength
- 130000 pounds per square inch
- Hardness Rating
- 24.0 rockwell C minimum and 35.0 rockwell C maximum
- Screw Material
- Iron alloy 660
- Bearing Surface of Head Surface Finish
- 32.0 microinches
- Thread Series Designator
- UNJF
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.