- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.242 inches minimum and 0.392 inches maximum
- Fastener Length
- 1.710 inches minimum and 1.757 inches maximum
- Head Style
- Double hexagon
- Head Height
- 0.177 inches minimum and 0.197 inches maximum
- Width Between Flats
- 0.492 inches minimum and 0.502 inches maximum
- Grip Diameter
- 0.3100 inches minimum and 0.3110 inches maximum
- Shank Unthreaded Hole Diameter
- 0.066 inches minimum first hole and 0.086 inches maximum first hole
- Nominal Thread Diameter
- 0.312 inches
- Grip Length
- 1.365 inches minimum and 1.385 inches maximum
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 200000 pounds per square inch
- Hardness Rating
- 46.0 rockwell C minimum overall and 49.0 rockwell C maximum overall
- Distance from Head Largest Bearing Surface to Shank Hole Center
- 1.497 inches minimum first hole and 1.517 inches maximum first hole
- Material
- Steel overall
- Material Document and Classification
- AICS-501 fscm 06725 mfr ref single material response overall
- Surface Treatment
- Cadmium overall
- Surface Treatment Document and Classification
- Nas 672 assn std single treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 56878-EWSB22 manufacturers standard
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.