- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.342 inches minimum and 0.392 inches maximum
- Fastener Length
- 0.550 inches minimum and 0.590 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.447 inches minimum and 0.507 inches maximum
- Shoulder Diameter
- 0.236 inches minimum first shoulder and 0.249 inches maximum first shoulder
- Shoulder Length
- 0.092 inches minimum first shoulder and 0.102 inches maximum first shoulder
- Internal Drive Style
- Cross recess type 1
- Nominal Thread Diameter
- 0.190 inches
- Thread Quantity per Inch
- 32
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Shoulder Shape
- Round first shoulder
- Material
- Steel comp 8630 overall or steel comp 4037 overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, ty 2, cl 3 fed spec all treatment responses overall
- Thread Series Designator
- UNF
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.