- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.362 inches minimum and 0.448 inches maximum
- Fastener Length
- 0.703 inches minimum and 0.743 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.172 inches minimum and 0.204 inches maximum
- Width Between Flats
- 0.490 inches minimum and 0.502 inches maximum
- Shoulder Diameter
- 0.3090 inches minimum first shoulder and 0.3120 inches maximum first shoulder
- Shoulder Length
- 0.260 inches minimum first shoulder and 0.270 inches maximum first shoulder
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 125000 pounds per square inch
- Hardness Rating
- 26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall
- Shoulder Shape
- Round first shoulder
- Material
- Steel comp 4140 overall or steel comp 8740 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 4130 overall or steel comp 4037 overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, ty 2 cl 3 fed spec single treatment response 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.