- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.594 inches maximum
- Fastener Length
- 0.998 inches minimum and 1.128 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.464 inches minimum and 0.507 inches maximum
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Shank Unthreaded Hole Diameter
- 0.076 inches minimum threads and 0.086 inches maximum threads
- Internal Drive Style
- Offset cruciform (torque set)
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.678 inches minimum and 0.698 inches maximum
- Thread Quantity per Inch
- 28
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Distance from Head Largest Bearing Surface to Shank Hole Center
- 0.997 inches nominal threads
- Material
- Iron alloy 660 overall
- Material Document and Classification
- Ams 5737 assn std single material response overall or ams 5732 assn std single material response overall or ams 5733 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-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.