- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.925 inches minimum and 1.083 inches maximum
- Fastener Length
- 1.234 inches minimum and 1.281 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.600 inches minimum and 0.656 inches maximum
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.312 inches
- Width Across Flats
- 0.188 inches nominal
- Thread Quantity per Inch
- 18
- Minimum Tensile Strength
- 80000 pounds per square inch
- Hardness Rating
- 80.0 rockwell B minimum overall
- Minimum Yield Strength
- 30000 pounds per square inch
- Countersink Angle
- 80.0 degrees minimum and 84.0 degrees maximum
- Material
- Steel comp 302 overall or steel comp 304 overall or steel comp 305 overall or steel comp 316 overall or steel comp 384 overall or steel overall
- Material Document and Classification
- 66 fed std 1ST material response overall or 66 fed std 2ND material response overall or 66 fed std 3RD material response overall or 66 fed std 4TH material response overall or 66 fed std 5TH material response overall or ASTM-A493 aisi XM-7 assn std 6TH material response overall
- Surface Treatment
- Passivate overall
- Surface Treatment Document and Classification
- QQ-P-35 fed spec single treatment response overall
- Thread Series Designator
- UNC
- Nondefinitive Spec/STD Data
- 4 type
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.