- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.444 inches minimum and 0.494 inches maximum
- Fastener Length
- 1.204 inches minimum and 1.234 inches maximum
- Head Style
- Flat countersunk undercut
- Head Diameter
- 0.502 inches minimum and 0.507 inches maximum
- Head Height
- 0.071 inches minimum and 0.073 inches maximum
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Internal Drive Style
- High-torque
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.740 inches minimum and 0.760 inches maximum
- Thread Quantity per Inch
- 28
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Surface Finish
- 32.0 microinches grip
- Surface Finish
- 32.0 microinches threads
- Special Features
- Assembled with one O-ring per ST7M251, fscm 76301; lubricated with cetyl alcohol
- Material
- Steel comp XM-13 overall
- Material Document and Classification
- AMS5629 assn std single material response overall
- Surface Treatment
- Aluminum 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.