Description

This is a Vishay / Spectrol / Sfernice 21‑1‑11 multiturn vernier dial knob, a 1‑13/16" (46.02 mm) diameter, 15‑turn precision dial used for fine‑tuning multiturn potentiometers and instruments. The satin‑chrome metal dial features a fixed‑window counter‑wheel (0–14) that indicates completed turns and a graduated‑circular dial showing the percent of the current partial turn (0–100%), effectively providing up to approximately 1499 incremental steps of resolution. The knob is designed to mount directly to a 1/4" (6.35 mm) shaft using a #4–40 hex‑socket set screw adjacent to the numeral 75 on the dial, and its machined‑metal construction and satin‑chrome finish make it suitable for industrial and test‑equipment panels where accurate, repeatable multiturn adjustment is required. This type of dial is commonly used in calibration instruments, laboratory equipment, and programmable‑controller calibration setups. new may or may not include original packaging because of storage space

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