- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.662 inches minimum and 0.712 inches maximum
- Fastener Length
- 1.423 inches minimum and 1.453 inches maximum
- Head Style
- Bevel-conical
- Head Diameter
- 0.639 inches minimum and 0.649 inches maximum
- Head Height
- 0.375 inches nominal
- Hole Diameter
- 0.055 inches nominal
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.375 inches
- Width Across Flats
- 0.313 inches minimum and 0.315 inches maximum
- Hole Quantity
- 4
- Hole Type
- Drilled
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hardness Rating
- 34.0 rockwell C minimum overall and 40.0 rockwell C maximum overall
- Hole Configuration Style
- Round longitudinal hole
- Material
- Steel comp 4140 overall or steel comp E4340 overall or steel comp 6150 overall or steel comp 8735 overall or steel comp 8740 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.