- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.475 inches minimum
- Fastener Length
- 2.912 inches nominal
- Head Style
- Bevel-conical
- Head Diameter
- 0.428 inches minimum and 0.438 inches maximum
- Head Height
- 0.250 inches minimum
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.250 inches
- Width Across Flats
- 0.188 inches minimum and 0.190 inches maximum
- Thread Quantity per Inch
- 28
- Hardness Rating
- 34.0 rockwell C minimum overall and 40.0 rockwell C maximum overall
- Material
- Steel overall
- Surface Treatment
- Chromate overall and cadmium overall
- Surface Treatment Document and Classification
- QQ-P-416, ty ii, cls 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.