- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 1.315 inches minimum and 1.653 inches maximum
- Fastener Length
- 2.940 inches minimum and 3.000 inches maximum
- Head Style
- Flat chamfer
- Head Diameter
- 0.457 inches minimum and 0.468 inches maximum
- Head Height
- 0.306 inches minimum and 0.312 inches maximum
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.312 inches
- Width Across Flats
- 0.250 inches minimum and 0.253 inches maximum
- Thread Quantity per Inch
- 18
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hardness Rating
- 39.0 rockwell C minimum overall and 45.0 rockwell C maximum overall
- Minimum Yield Strength
- 155000 pounds per square inch
- Material
- Steel overall
- Thread Series Designator
- UNC
- Nondefinitive Spec/STD Data
- 1 type
- Departure from Cited Document
- As modified by finish
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.