- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.290 inches minimum and 0.330 inches maximum
- Fastener Length
- 1.070 inches minimum and 1.090 inches maximum
- Head Style
- Hexagon countersunk
- Head Height
- 0.120 inches minimum and 0.140 inches maximum
- Width Between Flats
- 0.312 inches nominal
- Grip Diameter
- 0.1604 inches minimum and 0.1607 inches maximum
- Nominal Thread Diameter
- 0.164 inches
- Grip Length
- 0.542 inches nominal
- Thread Quantity per Inch
- 32
- Hardness Rating
- 40.0 rockwell C minimum and 47.0 rockwell C maximum overall
- Countersink Angle
- 58.0 degrees minimum and 60.0 degrees maximum
- Part Name Assigned BY Controlling Agency
- Navy special project
- Special Features
- Relief groove under head 0.040 in. max lg by 0.151 in. nom dia
- Material
- Steel comp 630 overall
- Material Document and Classification
- Ams 5643 assn std single material 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.