- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Series
- UNJF
- Nominal Thread Diameter
- 0.312 inches
- Thread Qty per Inch
- 24
- Thread Length
- 0.475 min – 0.525 max inches
- Fastener Length
- 0.923 min – 0.953 max inches
- Grip Length
- 0.428 min – 0.448 max inches
- Grip Diameter
- 0.3110 min – 0.3120 max inches
- Head Style
- Flat countersunk
- Head Diameter
- 0.429 min – 0.479 max inches
- Countersink Angle
- 99.0 min – 101.0 max degrees
- Internal Drive Style
- Offset cruciform (torque set)
- Surface Finish
- 32.0 microinches grip and threads
- Material
- Steel comp H11 overall
- Material Doc
- AMS 6487
- Min Tensile Strength
- 220,000 psi
- Hardness
- 46.0 RC min – 50.0 RC max overall
- Surface Treatment
- Aluminum overall
- Surface Treatment Doc
- MIL-C-83488 Type 2 Class 3
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.