- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.874 inches minimum and 0.934 inches maximum
- Fastener Length
- 1.562 inches nominal
- Head Style
- Double hexagon W/hole
- Head Height
- 0.348 inches nominal
- Width Between Flats
- 0.375 inches nominal
- Extended Washer Diameter
- 0.500 inches nominal
- Extended Washer Thickness
- 0.070 inches minimum
- Nominal Thread Diameter
- 0.312 inches
- Grip Length
- 0.628 inches minimum and 0.688 inches maximum
- Features Provided
- Finished head
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 130000 pounds per square inch
- Hardness Rating
- 24.0 rockwell C minimum overall and 35.0 rockwell C maximum overall
- Minimum Yield Strength
- 85000 pounds per square inch
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches grip
- Surface Finish
- 32.0 microinches threads
- Material
- Iron alloy 660 overall
- Material Document and Classification
- Ams 5731 assn std single material response 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.