- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.494 inches minimum and 0.625 inches maximum
- Fastener Length
- 0.594 inches minimum and 0.625 inches maximum
- Head Style
- Flat chamfer
- Head Diameter
- 0.365 inches minimum and 0.375 inches maximum
- Head Height
- 0.244 inches minimum and 0.250 inches maximum
- Internal Drive Style
- Hexagon
- End Item Identification
- Armored multi-purpose vehicle (ampv)
- Nominal Thread Diameter
- 0.250 inches
- Width Across Flats
- 0.188 inches minimum and 0.190 inches maximum
- Thread Quantity per Inch
- 20
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hardness Rating
- 36.0 rockwell C minimum and 45.0 rockwell C maximum overall
- Minimum Yield Strength
- 130000 pounds per square inch
- Material
- Steel overall
- Surface Treatment
- Cadmium and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, ty 2, cl 3 fed spec all treatment responses overall
- Thread Series Designator
- UNC
- Nondefinitive Spec/STD Data
- 6 type
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.