There is no direct US equivalent for a 1.75 mm crochet hook. However, it will fall between the US hook sizes of B-1 and C-2.
16 pcs Plastic Handle Crochet Hook 0.5mm-2.7mm Sizes – QuiltsSupply
What is the Best Crochet Hook Size for DK Yarn? - Catherine Crochets
Crochet Hook Size Guide: Chart, Types & Comparisons for Beginners - Easy Crochet Patterns
Ideal for working with crochet thread or beading, these beautifully crafted steel crochet hooks from Knitter's Pride can be used for a wide range of projects. Designed with comfort in mind, the Knitter's Pride Steel Crochet Hooks feature an ergonomic handle with a smooth, soft grip that can be used for all types of crocheters - even those with arthritis. The steel body of the hook is extremely durable with a steel tip that provides excellent visibility with any yarn color.
Knitter's Pride-Soft Feel Steel Crochet Hook-Size 1.75mm
Crochet Hooks and Crochet Hook Sizes: With Conversion Chart
Precision fine tip Crochet Hook Elastomer rubber handle Optimal hook shape Reduced fatigue
Clover 1220 Amour Steel Crochet Hook No. 0, 1.75mm , Green
Fine Crochet Hook L Sizes From 0.5 Mm to 1.75 Mm L Gold Ends L
New Lace Crochet Hook Small Size 1.0-1.75mm TPR Soft Rubber Handle
Crochet Hook Size Guide: Chart, Types & Comparisons for Beginners - Easy Crochet Patterns
What is the Best Crochet Hook Size for DK Yarn? - Catherine Crochets
What is the Best Crochet Hook Size for DK Yarn? - Catherine Crochets
Crochet Hook Sizes and Comparison Chart - Sarah Maker
Set of 10 Small Size Crochet Hook Set, Ergonomic Handle Crochet
17 TULIP Steel Crochet Hooks for Fine Lace Size 0/1.75mm to Size