- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.579 inches minimum
- Fastener Length
- 1.474 inches nominal
- Head Style
- Double hexagon extended washer
- Head Height
- 0.348 inches nominal
- Width Between Flats
- 0.360 inches minimum and 0.375 inches maximum
- Extended Washer Diameter
- 0.521 inches minimum and 0.531 inches maximum
- Extended Washer Thickness
- 0.082 inches nominal
- Grip Diameter
- 0.3110 inches minimum and 0.3120 inches maximum
- Nominal Thread Diameter
- 0.312 inches
- Grip Length
- 0.865 inches minimum and 0.885 inches maximum
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 180000 pounds per square inch
- Hardness Rating
- 39.0 rockwell C minimum overall and 43.0 rockwell C maximum overall
- Material
- Steel comp 8740 overall or steel comp E4340 overall or steel comp 6150 overall or steel comp 4140 overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, ty 2 cl 2 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.