- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.499 inches minimum and 0.578 inches maximum
- Fastener Length
- 2.203 inches minimum and 2.250 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.172 inches minimum and 0.204 inches maximum
- Width Between Flats
- 0.490 inches minimum and 0.502 inches maximum
- Grip Diameter
- 0.3112 inches minimum and 0.3117 inches maximum
- Nominal Thread Diameter
- 0.312 inches
- Grip Length
- 1.672 inches minimum and 1.704 inches maximum
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall
- Surface Finish
- 53.0 microinches grip
- Surface Finish
- 63.0 microinches bearing surface of head
- Material
- Steel comp 8740 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 4140 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.