- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 1.036 inches minimum and 1.076 inches maximum
- Fastener Length
- 3.171 inches minimum and 3.191 inches maximum
- Head Style
- Double hexagon W/hole
- Head Height
- 0.701 inches minimum and 0.721 inches maximum
- Width Between Flats
- 0.802 inches minimum and 0.822 inches maximum
- Extended Washer Diameter
- 1.220 inches minimum and 1.230 inches maximum
- Extended Washer Thickness
- 0.168 inches minimum and 0.188 inches maximum
- Grip Diameter
- 0.7480 inches minimum and 0.7490 inches maximum
- Nominal Thread Diameter
- 0.750 inches
- Grip Length
- 2.115 inches minimum and 2.135 inches maximum
- Thread Quantity per Inch
- 16
- 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
- Special Features
- Chamfer on thd end 0.046 in. min 0.078 in. max at 45 deg angle; internal chamfer on thread end 0.187 in. at 60 deg angle
- 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 ty 2 class 2 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.