- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.412 inches minimum and 0.452 inches maximum
- Fastener Length
- 0.490 inches minimum and 0.510 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
- 248.0 brinell standard minimum and 341.0 brinell standard 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.