- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 1.000 inches nominal
- Fastener Length
- 1.250 inches nominal
- Head Style
- Flat chamfer
- Head Diameter
- 0.367 inches minimum and 0.375 inches maximum
- Head Height
- 0.244 inches minimum and 0.250 inches maximum
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.250 inches
- Width Across Flats
- 0.187 inches minimum and 0.189 inches maximum
- Thread Quantity per Inch
- 20
- Hardness Rating
- 36.0 rockwell C minimum overall and 43.0 rockwell C maximum overall
- Minimum Yield Strength
- 140000 pounds per square inch
- Material
- Steel overall
- Material Document and Classification
- QQ-S-624 fed spec single material response overall
- Surface Treatment
- Cadmium overall or zinc overall
- Thread Series Designator
- UNC
- Nondefinitive Spec/STD Data
- 1 type and 11 style
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.