- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.901 inches minimum and 1.031 inches maximum
- Fastener Length
- 0.984 inches minimum and 1.031 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.156 inches minimum and 0.171 inches maximum
- Width Between Flats
- 0.429 inches minimum and 0.439 inches maximum
- Internal Drive Style
- Cross recess type 1
- Nominal Thread Diameter
- 0.312 inches
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hardness Rating
- 36.0 rockwell C minimum and 40.0 rockwell C maximum
- Screw Material
- Steel comp 4340 and steel comp 8740
- Screw Material Document and Classification
- MIL-S-5000 mil spec single material response and MIL-S-6049 mil spec single material response
- Screw Surface Treatment
- Cadmium and chromate
- Screw Surface Treatment Document and Classification
- QQ-P-416, ty 2, cl 2 fed spec single treatment response
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS1801 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.