- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.684 inches minimum and 0.704 inches maximum
- Fastener Length
- 1.856 inches minimum and 1.876 inches maximum
- Head Style
- Double hexagon W/hole
- Head Height
- 0.435 inches nominal
- Width Between Flats
- 0.490 inches minimum and 0.510 inches maximum
- Extended Washer Diameter
- 0.740 inches minimum and 0.750 inches maximum
- Extended Washer Thickness
- 0.099 inches nominal
- Grip Diameter
- 0.4360 inches minimum and 0.4370 inches maximum
- Nominal Thread Diameter
- 0.438 inches
- Grip Length
- 1.115 inches minimum and 1.135 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
- Special Features
- Drilled heat
- Material
- Steel comp 4140 overall or steel comp E4340 overall or steel comp 6150 overall or steel comp 8735 overall or steel comp 8740 overall
- Material Document and Classification
- MIL-S-5000 mil spec all material responses overall or MIL-S-5626 mil spec all material responses overall or MIL-S-6049 mil spec all material responses overall or MIL-S-6098 mil spec all material responses overall or MIL-S-8503 mil spec all material responses overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416 fed spec all treatment responses 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.