- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.501 inches nominal
- Fastener Length
- 0.986 inches minimum and 1.001 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.578 inches minimum and 0.633 inches maximum
- Grip Diameter
- 0.3427 inches minimum and 0.3432 inches maximum
- Internal Drive Style
- Offset cruciform (torque set)
- Nominal Thread Diameter
- 0.3125 inches
- Grip Length
- 0.490 inches minimum and 0.510 inches maximum
- Thread Quantity per Inch
- 32
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hardness Rating
- 36.0 rockwell C minimum overall and 40.0 rockwell C maximum overall
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Surface Finish
- 32.0 microinches grip
- Surface Finish
- 32.0 microinches threads
- Material
- Iron alloy 660 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-NAS1580 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.