- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.485 inches minimum and 0.515 inches maximum
- Fastener Length
- 0.735 inches minimum and 0.765 inches maximum
- Head Diameter
- 0.430 inches minimum and 0.438 inches maximum
- Head Height
- 0.226 inches nominal
- Hole Diameter
- 0.055 inches nominal
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.250 inches
- Width Across Flats
- 0.219 inches minimum and 0.221 inches maximum
- Hole Quantity
- 6
- Hole Type
- Drilled
- Thread Quantity per Inch
- 18
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hole Configuration Style
- Round
- Material
- Steel comp E4340 overall or steel comp 8740 overall or steel comp 6150 overall or steel overall
- Material Document and Classification
- MIL-S-5000 mil spec 1ST material response overall or MIL-S-6049 mil spec 2ND material response overall or MIL-S-8503 mil spec 3RD material response overall or AN-QQ-S-690 cond. E4 fed spec 4TH material response overall
- Surface Treatment
- Cadmium overall
- Thread Series Designator
- UNF
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.