- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.372 inches minimum and 0.422 inches maximum
- Fastener Length
- 0.632 inches minimum and 0.662 inches maximum
- Head Style
- Oval countersunk
- Head Diameter
- 0.421 inches minimum and 0.426 inches maximum
- Shoulder Diameter
- 0.249 inches minimum first shoulder and 0.2495 inches maximum first shoulder
- Shoulder Length
- 0.176 inches minimum first shoulder and 0.204 inches maximum first shoulder
- Internal Drive Style
- High-torque
- End Item Identification
- Fms - aircraft, hornet F/A-18;AIRCRAFT, eagle F-15;AIRCRAFT, hornet F/A-18;AIRCRAFT, harrier AV-8B
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Countersink Angle
- 100.0 degrees nominal
- Shoulder Shape
- Round first shoulder
- Special Features
- Socket drive recess in thread end 0.095 inch nominal width across flats
- Material
- Steel comp XM-13 overall
- Material Document and Classification
- AMS5629 assn std single material response overall
- Surface Treatment
- Passivate overall
- Surface Treatment Document and Classification
- QQ-P-35 fed spec single treatment response overall
- Thread Series Designator
- UNC
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.