- Thread Class
- 2A
- Thread Direction
- Right-hand
- Thread Length
- 0.406 inches minimum and 0.436 inches maximum
- Fastener Length
- 1.266 inches minimum and 1.296 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.357 inches nominal
- Shoulder Diameter
- 0.254 inches minimum first shoulder and 0.256 inches maximum first shoulder
- Shoulder Length
- 0.796 inches minimum first shoulder and 0.826 inches maximum first shoulder
- Internal Drive Style
- SLOT
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees nominal
- Shoulder Shape
- Round first shoulder
- Special Features
- Half of top surface of head painted orange
- Material
- Steel comp 4037 overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, type 2, class 3 fed spec single treatment response 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.