- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.656 inches minimum
- Fastener Length
- 4.094 inches nominal
- 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
- 3.438 inches nominal
- Thread Quantity per Inch
- 20
- Minimum Tensile Strength
- 125000 pounds per square inch
- Surface Finish
- 63.0 microinches bearing surface of head
- Surface Finish
- 63.0 microinches grip
- Material
- Steel comp 4140 overall or steel comp 8740 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 4130 overall or steel comp 4037 overall
- Surface Treatment
- Cadmium overall 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.