- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.398 in min / 0.500 in max
- Fastener Length
- 0.469 in min / 0.500 in max
- Head Style
- Flat chamfer
- Head Diameter
- 0.367 in min / 0.375 in max
- Head Height
- 0.133 in min / 0.150 in max
- Internal Drive Style
- Torque set
- Nominal Thread Diameter
- 0.250 inches (1/4-28 UNJF)
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 160,000 PSI
- Screw Material
- Iron alloy 660
- Surface Treatment
- Passivate per QQ-P-35
- Thread Series Designator
- UNJF
- Specification
- NAS1101
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.