- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.378 inches minimum and 0.428 inches maximum
- Fastener Length
- 1.013 inches minimum and 1.043 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.464 inches minimum and 0.507 inches maximum
- Grip Diameter
- 0.248 inches minimum and 0.249 inches maximum
- Internal Drive Style
- Offset cruciform (torque set)
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.615 inches minimum and 0.635 inches maximum
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Special Features
- Internal drive ribbed; drilled threads
- Material
- Iron alloy 660 overall
- Surface Treatment
- Passivate 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.