- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.768 inches minimum and 0.808 inches maximum
- Fastener Length
- 3.278 inches minimum and 3.298 inches maximum
- Head Style
- Double hexagon W/hole
- Head Height
- 0.494 inches minimum and 0.514 inches maximum
- Width Between Flats
- 0.552 inches minimum and 0.572 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
- Grip Diameter
- 0.4985 inches minimum and 0.4995 inches maximum
- Nominal Thread Diameter
- 0.500 inches
- Grip Length
- 2.490 inches minimum and 2.510 inches maximum
- 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
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches grip
- Material
- Steel comp 4140 overall or steel comp E4340 overall or steel comp 8740 overall or steel comp 6150 overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, TY2, CL2 fed spec 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.