- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.403 inches maximum
- Fastener Length
- 0.638-0.668 inches
- Head Style
- Flat countersunk
- Head Diameter
- 0.464-0.507 inches
- Grip Diameter
- 0.2485-0.2495 inches
- Internal Drive Style
- Torque-set ribbed
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.240-0.260 inches
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 160000 psi
- Hardness Rating
- 36.0-40.0 Rockwell C
- Countersink Angle
- 99.0-101.0 degrees
- Surface Finish (Grip)
- 32.0 microinches
- Surface Finish (Threads)
- 32.0 microinches
- Material
- Steel comp 4140/4340/8735
- Material Document
- MIL-S-5626/MIL-S-5000/MIL-S-6049
- Surface Treatment
- Cadmium and chromate
- Surface Treatment Doc
- QQ-P-416, type 2 cl 2
- Thread Series
- UNJF
- Specification
- NAS1580 (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.