- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.750 in min / 0.810 in max
- Fastener Length
- 0.938 in nominal
- Head Style
- Double hexagon W/hole
- Head Height
- 0.300 in nominal
- Width Between Flats
- 0.312 in nominal
- Extended Washer Diameter
- 0.438 in nominal
- Extended Washer Thickness
- 0.060 in minimum
- Hole Diameter
- 0.070 in nominal
- Nominal Thread Diameter
- 0.250 in
- Grip Length
- 0.128 in min / 0.188 in max
- Hole Quantity
- 4
- Hole Type
- Drilled
- Features Provided
- Finished head
- Thread Quantity per Inch
- 28
- Min Tensile Strength
- 130,000 psi
- Hardness Rating
- 248.0-341.0 Brinell
- Min Yield Strength
- 85,000 psi
- Hole Configuration Style
- Double hexagon longitudinal hole
- Surface Finish
- 32.0 microinches (bearing surface, grip, threads)
- Material
- Iron alloy 660 overall
- Material Spec
- AMS 5731
- 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.