- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.429 inches minimum and 0.578 inches maximum
- Fastener Length
- 2.141 inches minimum and 2.188 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.447 inches minimum and 0.507 inches maximum
- Internal Drive Style
- Cross recess type 1
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 85000 pounds per square inch
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Screw Material
- Steel comp 302 or steel comp 304
- Screw Material Document and Classification
- 66 fed std all material responses
- Screw Surface Treatment
- Passivate
- Screw Surface Treatment Document and Classification
- QQ-P-35 fed spec single treatment response
- Thread Series Designator
- UNF
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.