- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.589 inches minimum and 0.609 inches maximum
- Fastener Length
- 1.224 inches nominal
- Head Style
- Double hexagon W/hole
- Head Height
- 0.348 inches nominal
- Width Between Flats
- 0.367 inches minimum and 0.376 inches maximum
- Extended Washer Diameter
- 0.521 inches minimum and 0.531 inches maximum
- Extended Washer Thickness
- 0.082 inches nominal
- Hole Diameter
- 0.055 inches nominal
- Grip Diameter
- 0.3110 inches minimum and 0.3120 inches maximum
- Nominal Thread Diameter
- 0.312 inches
- Grip Length
- 0.615 inches minimum and 0.635 inches maximum
- Hole Quantity
- 4
- Hole Type
- Drilled
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 180000 pounds per square inch
- Hardness Rating
- 39.0 rockwell C minimum overall and 43.0 rockwell C maximum overall
- Hole Configuration Style
- Hexagon longitudinal hole
- Material
- Steel overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, type 2 cl 2 fed spec all treatment responses overall
- 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.