- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.663 inches minimum
- Fastener Length
- 0.719 inches minimum and 0.750 inches maximum
- Head Style
- Flat chamfer
- Head Diameter
- 0.262 inches minimum and 0.270 inches maximum
- Head Height
- 0.159 inches minimum and 0.164 inches maximum
- Locking Feature
- Patch threads or strip threads
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.164 inches
- Width Across Flats
- 0.1406 inches minimum and 0.1426 inches maximum
- Thread Quantity per Inch
- 36
- Minimum Tensile Strength
- 180000 pounds per square inch
- Hardness Rating
- 38.0 rockwell C minimum fastener and 45.0 rockwell C maximum fastener
- Minimum Yield Strength
- 155000 pounds per square inch
- Material
- Plastic locking feature
- Material
- Steel fastener
- Surface Treatment
- Cadmium fastener and chromate fastener
- Surface Treatment Document and Classification
- QQ-P-416, type 2 class 3 fed spec single treatment response fastener
- Thread Series Designator
- UNF
- 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.