- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.716 inches minimum and 0.766 inches maximum
- Fastener Length
- 1.976 inches minimum and 2.006 inches maximum
- Head Style
- Double hexagon W/hole
- Head Height
- 0.494 inches minimum and 0.514 inches maximum
- Width Between Flats
- 0.552 inches minimum and 0.572 inches maximum
- Extended Washer Diameter
- 0.818 inches minimum and 0.828 inches maximum
- Extended Washer Thickness
- 0.213 inches minimum and 0.233 inches maximum
- Grip Diameter
- 0.4985 inches minimum and 0.4995 inches maximum
- Nominal Thread Diameter
- 0.500 inches
- Grip Length
- 1.240 inches minimum and 1.260 inches maximum
- Thread Quantity per Inch
- 20
- Minimum Tensile Strength
- 180000 pounds per square inch
- Hardness Rating
- 43.0 rockwell C nominal overall
- Material
- Steel comp E4340 overall or steel comp 4140 overall or steel comp 8740 overall or steel comp 8735 overall
- Material Document and Classification
- MIL-S-5000 mil spec 1ST material response overall or MIL-S-5626 mil spec 2ND material response overall or MIL-S-6049 mil spec 3RD material response overall or MIL-S-6098 mil spec 4TH material response overall
- Surface Treatment
- Cadmium overall
- Surface Treatment Document and Classification
- Nas 672 assn std single treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS628 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.