- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.625 inches minimum and 0.703 inches maximum
- Fastener Length
- 3.953 inches minimum and 4.000 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.234 inches minimum and 0.266 inches maximum
- Width Between Flats
- 0.615 inches minimum and 0.627 inches maximum
- Grip Diameter
- 0.4362 inches minimum and 0.4367 inches maximum
- Nominal Thread Diameter
- 0.437 inches
- Grip Length
- 3.297 inches minimum and 3.328 inches maximum
- Thread Quantity per Inch
- 20
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell C minimum and 32.0 rockwell C maximum overall
- Material
- Steel comp 4140 or steel comp 8740 or steel comp 8630 or steel comp 8735 or steel comp 1033 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
- 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.