- Thread Class
- 2A
- Thread Direction
- Right-hand
- Thread Length
- 0.720 inches minimum and 0.862 inches maximum
- Fastener Length
- 0.969 inches minimum and 1.000 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.556 inches minimum and 0.635 inches maximum
- Internal Drive Style
- Cross recess type 1
- Nominal Thread Diameter
- 0.312 inches
- Thread Quantity per Inch
- 18
- Minimum Tensile Strength
- 80000 pounds per square inch
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Screw Material
- Steel corrosion resisting or steel
- Screw Material Document and Classification
- QQ-S-763, 300 series fed spec 1ST material response or 66, 300 series fed std 1ST material response or comp 16-18 or 18-8 assn std 2ND material response
- Screw Surface Treatment
- Passivate
- Screw Surface Treatment Document and Classification
- QQ-P-35 fed spec single treatment response
- Thread Series Designator
- UNC
- Nondefinitive Spec/STD Data
- 3 type and 3C style
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.