- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.589 inches nominal
- Fastener Length
- 0.750 inches nominal
- Head Style
- Flat countersunk
- Head Diameter
- 0.480 inches minimum and 0.531 inches maximum
- Head Height
- 0.161 inches nominal
- Locking Feature
- Patch or strip threads
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.250 inches
- Width Across Flats
- 0.156 inches nominal
- Thread Quantity per Inch
- 20
- Countersink Angle
- 80.0 degrees minimum and 84.0 degrees maximum
- Material
- Steel overall
- Surface Treatment
- Zinc overall
- Surface Treatment Document and Classification
- Astm B633, type ii, class fe/zn 5 assn std 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.