- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.656 inches nominal
- Fastener Length
- 4.719 inches nominal
- Head Style
- Hexagon
- Head Height
- 0.250 inches nominal
- Width Between Flats
- 0.625 inches nominal
- Nominal Thread Diameter
- 0.438 inches
- Grip Length
- 4.062 inches nominal
- Thread Quantity per Inch
- 20
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell C minimum and 32.0 rockwell C maximum overall
- Material
- Steel comp 4037 or steel comp 4130 or steel comp 4140 or steel comp 8630 or steel comp 8735 or steel comp 8740 overall
- Material Document and Classification
- MIL-B-6812 mil spec single material response overall
- Surface Treatment
- Cadmium and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, type 2, class 3 fed spec single treatment response 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.