- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.370 inches nominal
- Fastener Length
- 1.730 inches minimum and 1.760 inches maximum
- Head Style
- Dished hexagon
- Head Height
- 0.125 inches minimum and 0.140 inches maximum
- Width Between Flats
- 0.429 inches minimum and 0.439 inches maximum
- Hole Diameter
- 0.046 inches minimum and 0.056 inches maximum
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Shank Unthreaded Hole Diameter
- 0.076 inches minimum overall and 0.086 inches maximum overall
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 1.365 inches minimum and 1.385 inches maximum
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Distance from Head Largest Bearing Surface to Shank Hole Center
- 1.407 inches minimum overall and 1.437 inches maximum overall
- Surface Finish
- 32.0 microinches bearing surface of HEAD32.0 microinches GRIP32.0 microinches threads
- Material
- Iron alloy 660 overall
- Material Document and Classification
- Ams 5731 assn std 1ST material response overall or ams 5737 assn std 2ND material response overall
- Surface Treatment
- Cadmium overall and chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, TY2CL2 fed spec all treatment responses overall
- Thread Series Designator
- UNJF
- Specification/Standard Data
- 80205-NAS6304 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.