- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.425 inches nominal
- Fastener Length
- 0.800 inches nominal
- Head Style
- Hexagon
- Head Height
- 0.125 inches minimum and 0.140 inches maximum
- Width Between Flats
- 0.510 inches nominal
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- End Item Identification
- 1520-01-355-8250
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.365 inches minimum and 0.385 inches maximum
- Thread Quantity per Inch
- 28
- Surface Finish
- 125.0 microinches grip
- Surface Finish
- 125.0 microinches threads
- Surface Finish
- 32.0 microinches bearing surface of head
- Surface Finish
- 32.0 microinches sides of head
- Special Features
- Heat treatment is 180 ksi min. ult. tensile; 108 ksi min. ult. shear at room temperature
- Material
- Steel corrosion resisting overall
- Material Document and Classification
- Ams 5731 assn std single material response overall
- Surface Treatment
- Passivate overall
- Surface Treatment Document and Classification
- QQ-P-35 fed spec single treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS1954 professional/industrial association standard
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.