JIS B 2401 Series S — small static — dimension table

Name: JIS B 2401 Series S — small static — O-ring dimensions
Creator: oringy.sk
License: https://creativecommons.org/licenses/by-nc/4.0/

The Series S — small static series of the JIS B 2401 standard: 66 O-ring sizes. Each row lists the inner diameter (ID), cross-section (CS), outer diameter (OD) and a link to the matching O-ring in the catalogue.

ID = Inner diameter (ID, mm) · CS = Cross-section (CS, mm) · OD = Outer diameter (OD, mm)

O-ring dimensions — JIS B 2401 Series S — small static
Designation	Inner diameter (ID, mm)	Cross-section (CS, mm)	Outer diameter (OD, mm)	Catalogue product
S3	2.5	1.5	5.5	Choose material
S4	3.5	1.5	6.5	Choose material
S5	4.5	1.5	7.5	Choose material
S6	5.5	1.5	8.5	Choose material
S7	6.5	1.5	9.5	Choose material
S8	7.5	1.5	10.5	Choose material
S9	8.5	1.5	11.5	Choose material
S10	9.5	1.5	12.5	Choose material
S11.2	10.7	1.5	13.7	Nearest product10.5 × 1.5 mm
S12	11.5	1.5	14.5	Nearest product11.1 × 1.6 mm
S12.5	12	1.5	15	Choose material
S14	13.5	1.5	16.5	Choose material
S15	14.5	1.5	17.5	Nearest product14 × 1.5 mm
S16	15.5	1.5	18.5	Nearest product16 × 1.5 mm
S18	17.5	1.5	20.5	Nearest product18 × 1.5 mm
S20	19.5	1.5	22.5	Nearest product20 × 1.5 mm
S22	21.5	1.5	24.5	Nearest product22 × 1.5 mm
S22.4	21.9	2	25.9	Nearest product22 × 2 mm
S24	23.5	2	27.5	Nearest product23.52 × 1.78 mm
S25	24.5	2	28.5	Nearest product25 × 2 mm
S26	25.5	2	29.5	Nearest product25 × 2 mm
S28	27.5	2	31.5	Nearest product28 × 2 mm
S29	28.5	2	32.5	Nearest product28.3 × 1.78 mm
S30	29.5	2	33.5	Nearest product29 × 2 mm
S31.5	31	2	35	Choose material
S32	31.5	2	35.5	Nearest product31.47 × 1.78 mm
S34	33.5	2	37.5	Choose material
S35	34.5	2	38.5	Nearest product34.52 × 1.78 mm
S35.5	35	2	39	Choose material
S36	35.5	2	39.5	Nearest product35 × 2 mm
S38	37.5	2	41.5	Nearest product37 × 2 mm
S39	38.5	2	42.5	Nearest product39 × 2 mm
S40	39.5	2	43.5	Nearest product39 × 2 mm
S42	41.5	2	45.5	Nearest product42 × 2 mm
S44	43.5	2	47.5	Nearest product44 × 2 mm
S45	44.5	2	48.5	Choose material
S46	45.5	2	49.5	Nearest product45 × 2 mm
S48	47.5	2	51.5	Nearest product47.37 × 1.78 mm
S50	49.5	2	53.5	Nearest product49 × 2 mm
S53	52.5	2	56.5	Nearest product52 × 2 mm
S55	54.5	2	58.5	Nearest product55 × 2 mm
S56	55.5	2	59.5	Nearest product56 × 2 mm
S60	59.5	2	63.5	Nearest product60 × 2 mm
S63	62.5	2	66.5	Nearest product63 × 2 mm
S65	64.5	2	68.5	Nearest product65 × 2 mm
S67	66.5	2	70.5	Nearest product66.4 × 1.78 mm
S70	69.5	2	73.5	Nearest product69.57 × 1.78 mm
S71	70.5	2	74.5	Nearest product70 × 2 mm
S75	74.5	2	78.5	Nearest product75 × 2 mm
S80	79.5	2	83.5	Nearest product80 × 2 mm
S85	84.5	2	88.5	Nearest product85 × 2 mm
S90	89.5	2	93.5	Nearest product90 × 2 mm
S95	94.5	2	98.5	Nearest product95 × 2 mm
S100	99.5	2	103.5	Nearest product100 × 2 mm
S105	104.5	2	108.5	Nearest product105 × 2 mm
S110	109.5	2	113.5	Nearest product110 × 2 mm
S112	111.5	2	115.5	Nearest product112 × 1.5 mmLast few
S115	114.5	2	118.5	Nearest product115 × 2 mm
S120	119.5	2	123.5	Choose material
S125	124.5	2	128.5	Nearest product125 × 2 mm
S130	129.5	2	133.5	Nearest product130 × 2 mm
S132	131.5	2	135.5	Nearest product130 × 2 mm
S135	134.5	2	138.5	Nearest product135 × 2 mm
S140	139.5	2	143.5	Nearest product140 × 2 mm
S145	144.5	2	148.5	Nearest product145 × 3 mm
S150	149.5	2	153.5	Nearest product150 × 2 mm

Dimensions match the published tables of the JIS B 2401 standard. Outer diameter is computed as ID + 2 × cross-section.