- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.334 inches minimum and 0.384 inches maximum
- Fastener Length
- 0.969 inches minimum and 0.999 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.140 inches minimum and 0.172 inches maximum
- Width Between Flats
- 0.553 inches minimum and 0.565 inches maximum
- Grip Diameter
- 0.3737 inches minimum and 0.3742 inches maximum
- Nominal Thread Diameter
- 0.375 inches
- Grip Length
- 0.615 inches minimum and 0.635 inches maximum
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 130000 pounds per square inch
- Hardness Rating
- 24.0 rockwell C minimum overall and 35.0 rockwell C maximum overall
- Minimum Yield Strength
- 85000 pounds per square inch
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches grip
- Surface Finish
- 32.0 microinches threads
- Material
- Iron alloy 660 overall
- Material Document and Classification
- Ams 5732 assn std single material response overall
- Thread Series Designator
- UNF
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.