- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.365 inches nominal
- Fastener Length
- 1.043 inches minimum and 1.073 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.466 inches minimum
- 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
- 0.552 inches minimum and 0.572 inches maximum
- Thread Quantity per Inch
- 28
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Special Features
- Nutplat cbore between grip and thd/captive panel fastener
- Material
- Iron alloy 660 overall
- Material Document and Classification
- AMS5731 assn std single material response overall or AMS5737 assn std single material response overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, type ii, class 2 fed spec all treatment responses overall
- Thread Series Designator
- UNF
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.