- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.506 inches minimum and 0.556 inches maximum
- Fastener Length
- 0.891 inches minimum and 0.921 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.429 inches minimum and 0.477 inches maximum
- Grip Diameter
- 0.3110 inches minimum and 0.3120 inches maximum
- Internal Drive Style
- High-torque
- Nominal Thread Diameter
- 0.312 inches
- Grip Length
- 0.365 inches minimum and 0.385 inches maximum
- Thread Quantity per Inch
- 24
- Countersink Angle
- 101.0 degrees nominal
- Material
- Steel comp XM-13 overall
- Material Document and Classification
- Ams 5629 assn std single material response overall
- Surface Treatment
- Aluminum overall and chromate overall
- Surface Treatment Document and Classification
- MIL-C-83488 ty 2 cl 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.