- Thread Class
- 3A
- Thread Length
- 0.363 inches nominal
- Fastener Length
- 1.355 inches minimum and 1.385 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.466 inches minimum and 0.518 inches maximum
- Internal Drive Style
- Torque-set ribbed
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 16000 pounds per square inch
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Material
- Iron alloy 660 overall
- Material Document and Classification
- Ams 5731 assn std single material response overall or ams 5737 assn std single material response overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, type 2, class 2 fed spec all treatment responses overall
- Thread Series Designator
- UNJF
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.