- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.780 inches nominal
- Fastener Length
- 1.562 inches nominal
- Head Style
- Double hexagon extended washer
- Head Height
- 0.330 inches nominal
- Width Between Flats
- 0.305 inches minimum and 0.313 inches maximum
- Extended Washer Diameter
- 0.438 inches nominal
- Extended Washer Thickness
- 0.060 inches minimum and 0.070 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
- Material
- Steel comp 601 overall
- Material Document and Classification
- AMS6304 assn std single material response overall
- Surface Treatment
- Nickel overall and cadmium overall
- Surface Treatment Document and Classification
- AMS2416 assn std all treatment responses 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.