- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.388 inches nominal
- Fastener Length
- 0.500 inches nominal
- Head Style
- Flat countersunk undercut
- Head Diameter
- 0.359 inches minimum and 0.411 inches maximum
- Head Height
- 0.127 inches nominal
- Locking Feature
- Patch threads or strip threads
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.190 inches
- Width Across Flats
- 0.125 inches nominal
- Thread Quantity per Inch
- 24
- Countersink Angle
- 80.0 degrees minimum and 84.0 degrees maximum
- Material
- Steel overall
- Material Document and Classification
- FF-S-86 fed spec all material responses overall
- Surface Treatment
- Zinc overall
- Surface Treatment Document and Classification
- Astm B633 ty 2 clfe/zn 5 assn std all treatment responses 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.