- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 0.662 inches nominal
- Fastener Length
- 4.673 inches minimum and 4.703 inches maximum
- Head Style
- Bevel-conical
- Head Diameter
- 0.520 inches nominal
- Head Height
- 0.375 inches nominal
- Internal Drive Style
- Hexagon
- End Item Identification
- B52
- Nominal Thread Diameter
- 0.375 inches
- Width Across Flats
- 0.3130 inches minimum and 0.3150 inches maximum
- Thread Quantity per Inch
- 24
- Minimum Tensile Strength
- 160000 pounds per square inch
- Hardness Rating
- 34.0 rockwell C minimum fastener and 40.0 rockwell C maximum fastener
- 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
- Surface Treatment
- Cadmium overall or chromate overall
- Surface Treatment Document and Classification
- QQ-P-416, type ii, class 2 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.