- Thread Class
- 3B
- Thread Direction
- Left-hand
- Nut Style
- Hexagon
- Nut Height
- 0.281 inches nominal
- Drilled Hole Diameter
- 0.045 inches minimum and 0.050 inches maximum
- Hole Type and Quantity
- 3 drilled
- Width Across Flats
- 0.615 inches minimum and 0.627 inches maximum
- Thread Series
- UNJF
- Thread Quantity per Inch
- 20
- Hardness Rating
- 34.0 rockwell C minimum and 38.0 rockwell C maximum
- Nominal Thread Size
- 0.438 inches
- Hole Configuration Style
- Configuration B
- Countersink Angle
- 110.0 degrees nominal both ends
- Bearing Surface Type
- Chamfered or washer faced
- Bearing Surface Finish
- 125.0 microinches
- Material
- Steel comp 4130 overall
- Material Document and Classification
- MIL-S-6758, cond C4 mil spec single material response overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, ty 2, cl 2 fed spec single treatment response overall
- Specification/Standard Data
- 80205-NAS509 professional/industrial association standard
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.