- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.875 inches minimum
- Fastener Length
- 1.960 inches minimum and 2.000 inches maximum
- Head Style
- Flat chamfer
- Head Diameter
- 0.303 inches minimum and 0.312 inches maximum
- Head Height
- 0.185 inches minimum and 0.190 inches maximum
- Hole Diameter
- 0.044 inches minimum and 0.050 inches maximum
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.190 inches
- Width Across Flats
- 0.156 inches minimum and 0.159 inches maximum
- Hole Quantity
- 6
- Hole Type
- Drilled
- Thread Quantity per Inch
- 32
- Minimum Tensile Strength
- 180000 pounds per square inch
- Hardness Rating
- 38.0 rockwell C minimum overall and 45.0 rockwell C maximum overall
- Minimum Yield Strength
- 155000 pounds per square inch
- Hole Configuration Style
- Round internal hexagon
- Material
- Steel overall
- Surface Treatment
- Oxide overall
- Surface Treatment Document and Classification
- MIL-C-13924, cl 1 mil spec single treatment response overall
- Thread Series Designator
- UNRF
- Specification/Standard Data
- 80205-NAS1351 professional/industrial association standard
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.