Harbor Freight Dust Extractor [58 mm] to DeWalt 2.5 Hose (F)

Male-Female Coupler

Hercules (HF) Dust Extractor [SKU 58966]
https://www.harborfreight.com/12-gallon-osha-compliant-dust-extractor-58966.html
Major Dimensions Based on: https://www.printables.com/model/1077732-adapter-for-harbor-freight-hercules-hepa-dust-extr
Dimensions Re-Measured and Test-Fitted based on Physical Hardware.

2.5 (in) DeWalt Fits: Hoses designed for DeWalt's DVXxx Line of Shop Vacuums (e.g. DXVA19-2501)
https://www.amazon.com/DeWalt-DXVA19-2501-Durable-Hose-Yellow/dp/B07DYDK5N3

O.D. Fitted to 2.5" Hose (2 + 31/64)" O.D.
c.f. https://www.amazon.com/POWERTEC-70136-4-Inch-2-Inch-Reducer/dp/B002DSDSY2