- Thread Class
- 3B
- Thread Direction
- Right-hand
- Nut Style
- Hexagon
- Nut Height
- 0.271 inches minimum and 0.291 inches maximum
- Drilled Hole Diameter
- 0.069 inches minimum and 0.074 inches maximum
- Hole Type and Quantity
- 3 drilled
- Width Across Flats
- 1.728 inches minimum and 1.752 inches maximum
- Thread Series
- UNJF
- Thread Quantity per Inch
- 12
- Hardness Rating
- 34.0 rockwell C minimum and 38.0 rockwell C maximum
- Nominal Thread Size
- 1.2500 inches
- Hole Configuration Style
- Configuration B
- Countersink Angle
- 110.0 degrees nominal nut
- Bearing Surface Type
- Chamfered
- Material
- Steel comp 4130 overall or steel comp 4340 overall or steel comp E4340 overall
- Material Document and Classification
- MIL-S-6758 mil spec 1ST material response overall or MIL-S-5000 mil spec 2ND material response overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, type 2, class 2 fed spec single treatment response overall
- Specification/Standard Data
- 80205-NAS1423 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.