- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.291 inches minimum and 0.341 inches maximum
- Fastener Length
- 0.676 inches minimum and 0.706 inches maximum
- Head Style
- Flat countersunk
- Head Diameter
- 0.350 inches minimum and 0.399 inches maximum
- Grip Diameter
- 0.2485 inches minimum and 0.2495 inches maximum
- Internal Drive Style
- High-torque
- Nominal Thread Diameter
- 0.250 inches
- Grip Length
- 0.365 inches minimum and 0.385 inches maximum
- Thread Quantity per Inch
- 28
- Minimum Tensile Strength
- 160000 pounds per square inch
- Countersink Angle
- 99.0 degrees minimum and 101.0 degrees maximum
- Surface Finish
- 32.0 microinches grip
- Surface Finish
- 32.0 microinches threads
- Material
- Steel comp E4340 overall or steel comp 4140 overall or steel comp 8740 overall or steel comp 8735 overall or steel comp 6150 overall or steel comp 4130 overall
- Surface Treatment
- Nickel overall and cadmium overall
- Surface Treatment Document and Classification
- Ams 2416 assn std single treatment response overall
- Thread Series Designator
- UNF
Identification data is compiled from public DLA/FLIS sources. Supply detail
is from our own records. Availability, condition and certification are
confirmed on quotation. OmniSynk Distribution Services is a stocking distributor.