- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.283 inches minimum and 0.375 inches maximum
- Fastener Length
- 0.345 inches minimum and 0.375 inches maximum
- Head Style
- Flat chamfer
- Head Diameter
- 0.262 inches minimum and 0.270 inches maximum
- Head Height
- 0.159 inches minimum and 0.164 inches maximum
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.164 inches
- Width Across Flats
- 0.140 inches minimum and 0.142 inches maximum
- Thread Quantity per Inch
- 32
- Minimum Tensile Strength
- 130000 pounds per square inch
- Hardness Rating
- 248.0 brinell standard minimum overall and 341.0 brinell standard maximum overall
- Minimum Yield Strength
- 85000 pounds per square inch
- Material
- Iron alloy 660 overall
- Surface Treatment
- Passivate overall
- Surface Treatment Document and Classification
- MIL-S-5002 mil spec single treatment response overall
- Thread Series Designator
- UNC
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.