- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.716 inches minimum and 0.766 inches maximum
- Fastener Length
- 1.726 inches minimum and 1.756 inches maximum
- Head Style
- Double hexagon W/hole
- Head Height
- 0.494 inches minimum and 0.514 inches maximum
- Width Between Flats
- 0.556 inches minimum and 0.565 inches maximum
- Extended Washer Diameter
- 0.818 inches minimum and 0.828 inches maximum
- Extended Washer Thickness
- 0.113 inches minimum and 0.133 inches maximum
- Hole Diameter
- 0.055 inches nominal
- Grip Diameter
- 0.4985 inches minimum and 0.4995 inches maximum
- Nominal Thread Diameter
- 0.500 inches
- Grip Length
- 0.990 inches minimum and 1.010 inches maximum
- Hole Quantity
- 4
- Hole Type
- Drilled
- Thread Quantity per Inch
- 20
- Minimum Tensile Strength
- 180000 pounds per square inch
- Hardness Rating
- 39.0 rockwell C minimum overall and 43.0 rockwell C maximum overall
- Hole Configuration Style
- Double hexagon longitudinal hole
- Material
- Steel comp E4340 overall or steel comp 4140 overall or steel comp 8740 overall or steel comp 8735 overall or steel comp 6150 overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, TY2 fed spec single treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS628 professional/industrial association standard
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.