- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.342 inches minimum and 0.392 inches maximum
- Fastener Length
- 0.550 inches minimum and 0.590 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.109 inches minimum and 0.141 inches maximum
- Width Between Flats
- 0.365 inches minimum and 0.377 inches maximum
- Shoulder Diameter
- 0.186 inches minimum and 0.189 inches maximum first shoulder
- Shoulder Length
- 0.198 inches minimum and 0.208 inches maximum first shoulder
- Internal Drive Style
- W/O internal drive
- Nominal Thread Diameter
- 0.138 inches
- Thread Quantity per Inch
- 32
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell C minimum and 32.0 rockwell C maximum overall
- Shoulder Shape
- Round first shoulder
- Material
- Steel comp 4037 or steel comp 4130 or steel comp 8630 or steel comp 8735 or steel comp 8740 or steel comp 4140 overall
- Surface Treatment
- Cadmium and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, ty 2, cl 3 fed spec single treatment response overall
- Thread Series Designator
- UNJC
- Specification/Standard Data
- 80205-NAS1297 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.