- Thread Class
- 3A
- Thread Direction
- Right-hand
- Thread Length
- 1.500 inches minimum and 1.813 inches maximum
- Fastener Length
- 1.960 inches minimum and 2.000 inches maximum
- Head Style
- Knurled no. 5
- Head Diameter
- 0.550 inches minimum and 0.562 inches maximum
- Head Height
- 0.368 inches minimum and 0.375 inches maximum
- Internal Drive Style
- Hexagon
- Nominal Thread Diameter
- 0.375 inches
- Width Across Flats
- 0.312 inches nominal
- Thread Quantity per Inch
- 24
- Hardness Rating
- 38.0 rockwell C minimum overall and 43.0 rockwell C maximum overall
- Minimum Yield Strength
- 150000 pounds per square inch
- Material
- Steel uns K03104 overall
- Material Document and Classification
- Astm A574 assn std single material response overall
- Surface Treatment
- Zinc overall and chromate overall
- Surface Treatment Document and Classification
- Astm B633, type 2 assn std all treatment responses overall
- Thread Series Designator
- UNRF
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.