- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.438 inches nominal
- Fastener Length
- 1.485 inches minimum and 1.515 inches maximum
- Head Style
- Hexagon
- Head Height
- 0.156 inches minimum and 0.171 inches maximum
- Width Between Flats
- 0.492 inches minimum and 0.502 inches maximum
- Grip Diameter
- 0.3110 inches minimum and 0.3120 inches maximum
- Nominal Thread Diameter
- 0.312 inches
- Grip Length
- 1.052 inches minimum and 1.072 inches maximum
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 160000 pounds per square inch
- Surface Finish
- 32.0 microinches bearing surface of head
- Material
- Iron alloy 660 overall
- Material Document and Classification
- Ams 5731 assn std all material responses overall or ams 5737 assn std all material responses overall
- Surface Treatment
- Cadmium overall
- Surface Treatment Document and Classification
- QQ-P-416 ty 2 fed spec 1ST treatment response overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS6305 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.