- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.403 inches nominal
- Fastener Length
- 1.091 inches nominal
- Head Style
- Flat countersunk
- Head Diameter
- 0.464 inches minimum and 0.506 inches maximum
- Shoulder Diameter
- 0.279 inches minimum first shoulder and 0.280 inches maximum first shoulder
- Internal Drive Style
- Offset cruciform (torque set)
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Shoulder Shape
- Round first shoulder
- Material
- Steel comp E4340 overall or steel comp 4140 overall or steel comp 8740 overall or steel comp 8735 overall or steel comp 6150 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.