- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.848 inches minimum and 0.898 inches maximum
- Fastener Length
- 4.608 inches minimum and 4.638 inches maximum
- Head Style
- Double hexagon extended washer
- Head Height
- 0.608 inches minimum and 0.628 inches maximum
- Width Between Flats
- 0.682 inches minimum and 0.691 inches maximum
- Extended Washer Diameter
- 1.040 inches minimum and 1.050 inches maximum
- Extended Washer Thickness
- 0.140 inches minimum and 0.160 inches maximum
- Grip Diameter
- 0.6230 inches minimum and 0.6240 inches maximum
- Nominal Thread Diameter
- 0.625 inches
- Grip Length
- 3.740 inches minimum and 3.760 inches maximum
- Thread Quantity per Inch
- 18
- Minimum Tensile Strength
- 180000 pounds per square inch
- Hardness Rating
- 39.0 rockwell C minimum overall and 43.0 rockwell C maximum overall
- Material
- Steel comp E4340 overall or steel comp 4140 overall or steel comp 8740 overall or steel comp 8735 overall or steel comp 6150 overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, type 2, class 2 fed spec single treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS630 professional/industrial association standard
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.