Nominal viscosity values of flow cup viscosity standards at 25 °C

This table presents nominal data. Actual values, provided with each standard, may vary slightly from lot to lot and formulations are subject to change. If your application requires close conformity with published nominal values, please contact technical service to obtain the actual viscosity values associated with the current formulation.

Catalog Number	Viscosity Standard	Kinematic viscosity mm²/s (cSt)	Zahn Cup		Shell Cup		Ford Cup
Catalog Number	Viscosity Standard	Kinematic viscosity mm²/s (cSt)	Size	Drain time (s)	Size	Drain time (s)	Size	Drain time (s)
9727-W10	C6†	8.9	— —	— —	1 2	52 20	—	—
9727-W12	C10†	17	1 —	45 —	2 2½	35 22	1 —	70 —
9727-W15	C20†	34	1 2 —	60 24 —	2 2½ 3	64 40 24	2 — —	42 — —
9727-W20	C35†	66	2 — —	33 — —	2½ 3 3½	74 46 32	2 3 —	64 35 —
9727-W25	C60†	120	2 —	48 —	3½ 4	57 36	3 4	58 36
9727-W30	C100†	230	3 4	27 21	4 5	68 36	4 —	64 —
9727-W35	C200†	420	3 4	43 32	5 6	64 26	5 —	36 —
9727-W40	C350	710	4 5	53 31	6 —	44 —	5 —	60 —
9727-W45	C600	1200	5	54	—	—	—	—

† Data is also provided for ISO cups

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