- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.355 inches minimum and 0.375 inches maximum
- Fastener Length
- 0.855 inches minimum and 0.875 inches maximum
- Head Style
- Flat chamfer
- Head Diameter
- 0.357 inches minimum and 0.375 inches maximum
- Head Height
- 0.177 inches minimum and 0.188 inches maximum
- Shoulder Diameter
- 0.246 inches minimum and 0.248 inches maximum all shoulders
- Shoulder Length
- 0.500 inches nominal all shoulders
- Internal Drive Style
- Hexagon
- End Item Identification
- 01-668-1220
- Nominal Thread Diameter
- 0.190 inches
- Width Across Flats
- 0.227 inches nominal
- Thread Quantity per Inch
- 24
- Chamfer Angle
- 30.0 degrees minimum and 45.0 degrees maximum
- Shoulder Shape
- Round all shoulders
- Material
- Steel overall
- Material Document and Classification
- NAS-21472 national std single material response overall
- Surface Treatment
- Zinc and chromate 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.