- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.625 inches minimum and 0.685 inches maximum
- Fastener Length
- 0.750 inches nominal
- Head Style
- Hexagon
- Head Height
- 0.156 inches nominal
- Width Between Flats
- 0.430 inches minimum and 0.439 inches maximum
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.065 inches minimum and 0.125 inches maximum
- Features Provided
- Finished head
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall
- Surface Finish
- 32.0 microinches threads
- Surface Finish
- 63.0 microinches bearing surface of head
- Surface Finish
- 63.0 microinches grip
- Material
- Steel comp 8740 overall
- Material Document and Classification
- Ams 6322 assn std single material 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.