- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.544 inches minimum and 0.615 inches maximum
- Fastener Length
- 0.615 inches minimum and 0.635 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.146 inches minimum and 0.166 inches maximum
- Width Between Flats
- 0.430 inches minimum and 0.439 inches maximum
- Shank Unthreaded Hole Diameter
- 0.065 inches minimum first hole and 0.072 inches maximum first hole
- Nominal Thread Diameter
- 0.250 inches
- Features Provided
- Finished head
- Thread Quantity per Inch
- 28
- Hardness Rating
- 26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall
- Distance from Head Largest Bearing Surface to Shank Hole Center
- 0.505 inches minimum first hole and 0.525 inches maximum first hole
- Surface Finish
- 63.0 microinches bearing surface of head
- Surface Finish
- 63.0 microinches threads
- Material
- Steel comp 8740 overall
- Material Document and Classification
- Ams 6322 assn std single material response overall
- Surface Treatment
- Cadmium overall
- Surface Treatment Document and Classification
- Ams 2400 assn std single treatment response 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.