- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.594 inches minimum and 0.644 inches maximum
- Fastener Length
- 1.166 inches minimum and 1.196 inches maximum
- Head Style
- Double hexagon extended washer
- Head Height
- 0.378 inches minimum and 0.398 inches maximum
- 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
- 0.081 inches minimum and 0.101 inches maximum
- Grip Diameter
- 0.3735 inches minimum and 0.3745 inches maximum
- Nominal Thread Diameter
- 0.375 inches
- Grip Length
- 0.552 inches minimum and 0.572 inches maximum
- Thread Quantity per Inch
- 24
- 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 E4340 overall or steel comp 4140 overall or steel comp 8740 overall or steel comp 8735 overall
- Surface Treatment
- Cadmium overall
- Surface Treatment Document and Classification
- QQ-P-416, type 2 fed spec single treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS626 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.