- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.423 inches minimum and 0.440 inches maximum
- Fastener Length
- 0.453 inches minimum and 0.500 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.219 inches nominal
- Width Between Flats
- 0.428 inches minimum and 0.440 inches maximum
- Hole Diameter
- 0.070 inches minimum and 0.080 inches maximum
- Nominal Thread Diameter
- 0.250 inches
- Hole Quantity
- 3
- Hole Type
- Drilled
- Features Provided
- Finished head
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hardness Rating
- 36.0 rockwell C minimum overall and 40.0 rockwell C maximum overall
- Hole Configuration Style
- Hexagon corners
- Material
- Iron alloy 660 overall
- Material Document and Classification
- Ams 5737 assn std single material response overall
- Surface Treatment
- Passivate overall
- Surface Treatment Document and Classification
- QQ-P-35 fed spec single treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS564 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.