- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.370 inches nominal
- Fastener Length
- 3.745 inches nominal
- Head Style
- Dished hexagon
- Head Height
- 0.125 inches minimum and 0.140 inches maximum
- Width Between Flats
- 0.429 inches minimum and 0.439 inches maximum
- Grip Diameter
- 0.248 inches minimum and 0.249 inches maximum
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 3.375 inches nominal
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Material
- Steel comp 4340 overall or steel comp 8740 overall
- Material Document and Classification
- AMS6415 assn std 1ST material response overall or AMS6322 assn std 2ND material response overall or MIL-S-6049 mil spec 2ND material response overall
- Surface Treatment
- Cadmium overall
- Surface Treatment Document and Classification
- QQ-P-416, tyii, CL2 fed spec single treatment response 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.