- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.425 inches nominal
- Fastener Length
- 3.550 inches nominal
- Head Style
- Dished hexagon
- Head Height
- 0.125 inches nominal
- Width Between Flats
- 0.429 inches minimum and 0.439 inches maximum
- Grip Diameter
- 0.2490 inches minimum and 0.2495 inches maximum
- Shank Unthreaded Hole Diameter
- 0.076 inches nominal first hole
- Nominal Thread Diameter
- 0.2500 inches
- Grip Length
- 3.125 inches nominal
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Distance from Head Largest Bearing Surface to Shank Hole Center
- 3.372 inches nominal first hole
- Material
- Iron alloy 660 fastener
- Material
- Plastic polyamide locking feature
- Surface Treatment
- Passivate fastener
- Thread Series Designator
- UNJF
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.