- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.338 inches minimum and 0.388 inches maximum
- Fastener Length
- 0.910 inches minimum and 0.940 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.339 inches minimum and 0.381 inches maximum
- Shoulder Diameter
- 0.2197 inches minimum first shoulder and 0.2207 inches maximum first shoulder
- Shoulder Length
- 0.552 inches minimum first shoulder and 0.572 inches maximum first shoulder
- Internal Drive Style
- Offset cruciform (torque set)
- Nominal Thread Diameter
- 0.190 inches
- 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
- Shoulder Shape
- Round first shoulder
- Material
- Steel comp E4340 overall or steel comp 4140 overall or steel comp 8740 overall or steel comp 6150 overall or steel comp 8735 overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, ty 2, cl 2 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.