- Thread Class
- 1A
- Thread Direction
- Right-hand
- Thread Length
- 0.750 inches minimum
- Fastener Length
- 3.125 inches nominal
- Head Style
- Double hexagon W/hole
- Head Height
- 0.330 inches nominal
- Width Between Flats
- 0.304 inches minimum and 0.313 inches maximum
- Extended Washer Diameter
- 0.500 inches nominal
- Extended Washer Thickness
- 0.057 inches minimum and 0.063 inches maximum
- First Diameter from Head
- 0.218 inches minimum and 0.228 inches maximum
- Second Diameter from Head
- 0.240 inches minimum and 0.247 inches maximum
- Distance from Largest Bearing Surface of Head to End of First Diameter
- 2.375 inches nominal
- Distance from Largest Bearing Surface of Head to End of Second Diameter
- 3.125 inches nominal
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Minimum Yield Strength
- 85000 pounds per square inch
- Externally Relieved Body Diameter Quantity
- 2
- Material
- Iron alloy 660 overall
- Material Document and Classification
- Ams 5735 assn std single material response overall
- Surface Treatment
- Passivate overall
- Thread Series Designator
- UNF
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.