- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.635 inches minimum and 0.655 inches maximum
- Fastener Length
- 3.645 inches nominal
- Head Style
- Double hexagon W/hole
- Head Height
- 0.388 inches nominal
- Width Between Flats
- 0.430 inches minimum and 0.439 inches maximum
- Extended Washer Diameter
- 0.639 inches minimum and 0.649 inches maximum
- Extended Washer Thickness
- 0.091 inches nominal
- Hole Diameter
- 0.055 inches nominal
- Grip Diameter
- 0.3735 inches minimum and 0.3745 inches maximum
- Nominal Thread Diameter
- 0.375 inches
- Grip Length
- 2.990 inches minimum and 3.010 inches maximum
- Hole Quantity
- 4
- Hole Type
- Drilled
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 180000 pounds per square inch
- Hardness Rating
- 39.0 rockwell C minimum and 43.0 rockwell C maximum overall
- Hole Configuration Style
- Double hexagon longitudinal hole
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches grip
- Material
- Steel comp 4140 or steel comp E4340 or steel comp 8740 or steel comp 6150 overall
- Material Document and Classification
- MIL-S-5626 mil spec 1ST material response or MIL-S-5000 mil spec 2ND material response or MIL-S-6049 mil spec 3RD material response or MIL-S-8503 mil spec 4TH material response overall
- Surface Treatment
- Cadmium and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416 ty 2 cl 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.