- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.680 inches minimum and 0.730 inches maximum
- Fastener Length
- 1.690 inches minimum and 1.720 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 0.605 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
- 0.990 inches minimum and 1.010 inches maximum
- Hole Quantity
- 4
- Hole Type
- Drilled
- Thread Quantity per Inch
- 20
- Minimum Tensile Strength
- 220000 pounds per square inch
- Hole Configuration Style
- Spline
- Material
- Steel comp XM-13 overall
- Material Document and Classification
- AMS5629 assn std single material response overall
- Surface Treatment
- Aluminum overall and chromate overall
- Surface Treatment Document and Classification
- MIL-C-83488, type 2 class 3 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.