- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.349 inches minimum
- Fastener Length
- 0.438 inches nominal
- Head Style
- Hexagon
- Head Height
- 0.156 inches nominal
- Width Between Flats
- 0.430 inches minimum and 0.439 inches maximum
- First Diameter from Head
- 0.222 inches minimum and 0.323 inches maximum
- Distance from Largest Bearing Surface of Head to End of First Diameter
- 0.079 inches minimum and 0.099 inches maximum
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Hardness Rating
- 42.0 rockwell C minimum overall and 46.0 rockwell C maximum overall
- Externally Relieved Body Diameter Quantity
- 1
- Material
- Steel comp 601 overall
- Material Document and Classification
- Ams 6304 assn std single material response overall
- Surface Treatment
- Nickel overall and cadmium overall
- Surface Treatment Document and Classification
- Ams 2416 assn std single treatment 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.