- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.444-0.494 inches
- Fastener Length
- 2.204-2.234 inches
- Head Style
- Dished hexagon
- Head Height
- 0.156-0.171 inches
- Width Between Flats
- 0.492-0.502 inches
- Grip Diameter
- 0.3110-0.3120 inches
- Shank Unthreaded Hole Diameter
- 0.076-0.086 inches (first hole)
- Nominal Thread Diameter
- 0.312 inches (5/16-24 UNJF)
- Grip Length
- 1.740-1.760 inches
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 160,000 PSI
- Hardness Rating
- 36.0-40.0 Rockwell C
- Distance Head to Shank Hole Center
- 2.013-2.063 inches (first hole)
- Surface Finish
- 32.0 microinches (bearing surface, grip, threads)
- Material
- Steel comp E4340 or Steel comp 8740
- Material Spec
- MIL-S-5000 / MIL-S-6049 / AMS 6322
- Surface Treatment
- Chromate and Cadmium (QQ-P-416 Ty 2 Cl 2)
- Thread Series
- UNJF
- Specification
- NAS6605 (80205)
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.