- Thread Class
- A3A
- Thread Direction
- Right-hand
- Thread Length
- 0.316 inches nominal
- Fastener Length
- 1.378 inches nominal
- Head Style
- Flat countersunk
- Head Diameter
- 0.497 inches minimum and 0.507 inches maximum
- Hole Diameter
- 0.076 inches nominal
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Internal Drive Style
- Offset cruciform (torque set)
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 1.052 inches minimum and 1.072 inches maximum
- Hole Quantity
- 1
- Hole Type
- Drilled
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 5820 pounds per square inch
- Hole Configuration Style
- Round
- Countersink Angle
- 99.0 degrees maximum and 101.0 degrees maximum
- Material
- Steel comp 4140 overall
- Material Document and Classification
- MIL-S-5626 mil spec single material response overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416 ty 2 fed spec single treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS1154 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.