- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.438 inches minimum and 0.515 inches maximum
- Fastener Length
- 1.641 inches minimum and 1.688 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.140 inches minimum and 0.172 inches maximum
- Width Between Flats
- 0.418 inches minimum and 0.440 inches maximum
- Hole Diameter
- 0.046 inches nominal
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 1.172 inches minimum and 1.203 inches maximum
- Hole Quantity
- 1
- Hole Type
- Drilled
- Features Provided
- Finished head
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall
- Hole Configuration Style
- Hexagon flats
- Material
- Steel comp 431 overall
- Material Document and Classification
- MIL-S-18732 mil spec single material response overall
- Surface Treatment
- Passivate 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.