- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.491 inches minimum and 0.511 inches maximum
- Fastener Length
- 1.611 inches minimum and 1.641 inches maximum
- Head Style
- Flat countersunk undercut
- Head Diameter
- 0.429 inches minimum and 0.479 inches maximum
- Head Height
- 0.070 inches nominal
- Grip Diameter
- 0.311 inches minimum and 0.312 inches maximum
- Internal Drive Style
- Offset cruciform (torque set)
- Nominal Thread Diameter
- 0.312 inches
- Grip Length
- 1.115 inches minimum and 1.135 inches maximum
- Thread Quantity per Inch
- 24
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Material
- Steel overall
- Surface Treatment
- Cadmium overall
- Surface Treatment Document and Classification
- QQ-P-416, ty ii, cl 3 fed spec single treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS1581 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.