Lot of 10 USSR Straight Nut Taps M4 Metric HSS

For sale is a vintage factory pack of 10 straight machine/nut taps manufactured in the USSR. Made of premium Soviet High-Speed Steel R6M5 (equivalent to HSS / M2 grade). Quantity: 10 pieces total (original paper wrap included). Size: Metric M4. Precision Class: H1 — the highest precision class available (equivalent to international ISO 1 / 4H tolerance). Ideal for tight, high-accuracy threads. Condition: Brand New Old Stock (NOS), unused warehouse condition, perfectly preserved in original factory oil paper. No rust, flawless cutting teeth. Premium quality industrial tooling for watchmakers, electronics repair, precision mechanics, or tool collectors!