- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.594 inches minimum and 0.750 inches maximum
- Fastener Length
- 0.719 inches minimum and 0.750 inches maximum
- Head Style
- Flat chamfer
- Head Diameter
- 0.550 inches minimum and 0.562 inches maximum
- Head Height
- 0.368 inches minimum and 0.375 inches maximum
- Locking Feature
- Patch threads or strip threads
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.375 inches
- Width Across Flats
- 0.3125 inches minimum and 0.3160 inches maximum
- Thread Quantity per Inch
- 16
- Minimum Tensile Strength
- 170000 pounds per square inch
- Hardness Rating
- 38.0 rockwell C minimum overall and 45.0 rockwell C maximum overall
- Minimum Yield Strength
- 150000 pounds per square inch
- Surface Finish
- 32.0 microinches threads
- Surface Finish
- 63.0 microinches bearing surface of head
- Material
- Steel overall
- Material Document and Classification
- 66 fed std single material response overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, type 2 class 3 fed spec single treatment response 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.