- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Series
- UNJF
- Nominal Thread Diameter
- 0.250 inches
- Thread Qty per Inch
- 28
- Thread Length
- 0.403 inches nominal
- Fastener Length
- 1.638 min – 1.668 max inches
- Grip Length
- 1.240 min – 1.260 max inches
- Grip Diameter
- 0.2485 min – 0.2495 max inches
- Head Style
- Flat countersunk
- Head Diameter
- 0.350 min – 0.399 max inches
- Countersink Angle
- 99.0 min – 101.0 max degrees
- Internal Drive Style
- Offset cruciform (torque set)
- Single Shear Strength
- 132,000 psi
- Surface Finish
- 32.0 microinches (bearing surface of head, grip, 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
- Cadmium overall and chromate overall
- Surface Treatment Doc
- NAS 672
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.