- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.823 inches minimum and 0.873 inches maximum
- Fastener Length
- 2.333 inches minimum and 2.363 inches maximum
- Head Style
- Spline extended washer
- Head Height
- 0.310 inches minimum and 0.350 inches maximum
- Width Between Flats
- 0.514 inches minimum and 0.521 inches maximum
- Extended Washer Diameter
- 0.807 inches minimum and 0.817 inches maximum
- Extended Washer Thickness
- 0.053 inches minimum and 0.073 inches maximum
- Hole Diameter
- 0.050 inches minimum and 0.060 inches maximum
- Grip Diameter
- 0.4360 inches minimum and 0.4370 inches maximum
- Nominal Thread Diameter
- 0.438 inches
- Grip Length
- 1.490 inches minimum and 1.510 inches maximum
- Hole Quantity
- 4
- Hole Type
- Drilled
- Thread Quantity per Inch
- 20
- Minimum Tensile Strength
- 260000 pounds per square inch
- Hardness Rating
- 51.0 rockwell C minimum overall and 54.0 rockwell C maximum overall
- Hole Configuration Style
- Round longitudinal hole
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches grip
- Material
- Steel comp H11 overall
- Material Document and Classification
- Ams 6487 assn std single material response overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- MIL-S-8837 ty 2 cl 2 mil spec single treatment response overall
- 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.