- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.500 inches minimum
- Fastener Length
- 0.500 inches nominal
- Head Style
- Flat countersunk
- Head Diameter
- 0.231 inches minimum and 0.279 inches maximum
- Locking Feature
- Patch threads or strip threads
- Internal Drive Style
- Cross recess type 1
- Nominal Thread Diameter
- 0.138 inches
- Thread Quantity per Inch
- 32
- Hardness Rating
- 36.0 rockwell C minimum overall and 40.0 rockwell C maximum overall
- Countersink Angle
- 100.0 degrees nominal
- Material
- Steel overall
- Surface Treatment
- Cadmium overall and chromate overall
- Thread Series Designator
- UNC
- Specification/Standard Data
- 80205-NAS1198 professional/industrial association standard
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.