- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.516 inches minimum and 0.596 inches maximum
- Fastener Length
- 1.115 inches minimum and 1.135 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.094 inches minimum and 0.106 inches maximum
- Width Between Flats
- 0.243 inches minimum and 0.251 inches maximum
- Nominal Thread Diameter
- 0.138 inches
- Thread Quantity per Inch
- 40
- Minimum Tensile Strength
- 130000 pounds per square inch
- Hardness Rating
- 24.0 rockwell C minimum and 35.0 rockwell C maximum
- Screw Material
- Iron alloy 660
- Screw Material Document and Classification
- Ams 5731 assn std single material response
- 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.