- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.509 inches minimum and 0.559 inches maximum
- Fastener Length
- 1.207 inches minimum and 1.237 inches maximum
- Head Style
- Spline extended washer
- Head Height
- 0.194 inches minimum and 0.234 inches maximum
- Extended Washer Diameter
- 0.460 inches minimum and 0.470 inches maximum
- Extended Washer Thickness
- 0.026 inches minimum and 0.046 inches maximum
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Head Minor Diameter
- 0.318 inches minimum and 0.324 inches maximum
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.678 inches minimum and 0.698 inches maximum
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 260000 pounds per square inch
- Hardness Rating
- 51.0 rockwell C minimum overall and 54.0 rockwell C maximum overall
- 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-C-8837 type 2 class 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.