- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.425 inches nominal
- Fastener Length
- 2.160 inches minimum and 2.190 inches maximum
- Head Style
- Dished hexagon
- Head Height
- 0.125 nominal mils and 0.140 nominal centimeters
- Width Between Flats
- 0.430 inches minimum and 0.439 inches maximum
- Grip Diameter
- 0.249 nominal mils and 0.250 nominal centimeters
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 1.740 inches minimum and 1.760 inches maximum
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Part Name Assigned BY Controlling Agency
- Bolt tension hex head close tolerance A286 cres long thread reduced major thread dia self locking and non locking 160 ksi ftu
- Material
- Iron alloy 660 overall
- Surface Treatment
- Passivate overall
- Thread Series Designator
- UNJF
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.