- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.533 inches minimum and 0.588 inches maximum
- Fastener Length
- 2.418 inches minimum and 2.453 inches maximum
- Head Style
- Bevel-conical
- Head Diameter
- 0.526 inches nominal
- Head Height
- 0.312 inches nominal
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.312 inches
- Width Across Flats
- 0.2200 inches nominal
- Thread Quantity per Inch
- 24
- Hardness Rating
- 34.0 rockwell C minimum overall and 40.0 rockwell C maximum overall
- Material
- Steel comp 4140 overall or steel comp E4340 overall or steel comp 6150 overall or steel comp 8735 overall or steel comp 8740 overall
- Material Document and Classification
- MIL-S-5626 mil spec 1ST material response overall or MIL-S-5000 mil spec 2ND material response overall or MIL-S-8503 mil spec 3RD material response overall or MIL-S-6098 mil spec 4TH material response overall or MIL-S-6049 mil spec 5TH 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.