- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.688 inches nominal
- Fastener Length
- 0.609 inches nominal
- Head Style
- Double hexagon extended washer
- Head Height
- 0.300 inches nominal
- Width Between Flats
- 0.312 inches nominal
- Extended Washer Diameter
- 0.438 inches nominal
- Extended Washer Thickness
- 0.060 inches nominal
- Shank Unthreaded Hole Diameter
- 0.222 inches minimum first hole and 0.232 inches maximum first hole
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Hardness Rating
- 36.0 rockwell C minimum overall and 45.0 rockwell C maximum overall
- Distance from Head Largest Bearing Surface to Shank Hole Center
- 0.099 inches nominal first hole
- Surface Finish
- 32.0 microinches bearing surface of HEAD32.0 microinches threads
- Material
- Nickel alloy 718 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.