O-Rings / P Series

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MISUMI

[One O-ring, P series.

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Part Number

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Part Numbers
Catalog

Type	Material	Hardness (JIS Hs)	Color	Operable Temperature Range	JIS Symbol	Applications	Features
NPA	Nitrile Rubber	70±5	Black	-30~100°C	Class 1 A	Mineral Oil Resistant	Most representative material with superior oil / abrasion resistance and heat stability.
NPB	Nitrile Rubber	90±5	Black	-25~100°C	Class 1 B	Mineral Oil Resistant
NPSW	Silicon Rubber	50±5	Milky White	-50~200°C	-	Heat Resistant	Having excellent high and low temperature resistances, this material covers the widest range of operating temperatures among synthetic rubbers.
NPSK	Silicon Rubber	70±5	Scarlet Red	-50~200°C	Class 4 C	Heat Resistant
NPF	Fluoro Rubber	70±5	Black	-15~200°C	Class 4 D	Heat Resistant	Best in oil / chemical resistance and heat stability as synthetic rubber. Suitable for a wide range of applications.
NPFH	Fluoro Rubber	90±5	Black	-15~200°C	-	Heat Resistant
NPEG	Ethylene Propylene Rubber	70±5	Black	-45~130°C	-	For weather resistant items	Excellent material in weather resistance, ozone resistance and electrical characteristics.
NPBR	Fluororesin	-	White	Subject to O-ring	-	For high voltage use	Used when the pressure resistance of O-ring is insufficient.

Specifications

Part Number

NPSK25.5

■JIS B 2407 Back-Up Rings (For the P Series, Bias Cut)

Part Number		Nominal No. of Applicable O-Rings	W		d		D		T		Unit Price	Volume Discount Rate
Type	No.	Nominal No. of Applicable O-Rings	W		d		D		T		1 ~ 19 pc(s).	20~50
NPBR (Fluororesin, White)	15	P15	2.0	+0.03 -0.05	15	+0.15 0	19	0 -0.15	1.25	±0.1
	16	P16			16		20
	18	P18			18		22
	20	P20			20		24
	21	P21			21		25
	22	P22			22		26
	22A	P22A	3.0		22	+0.20 0	28	0 -0.20
	24	P24			24		30
	25	P25			25		31
	26	P26			26		32
	28	P28			28		34
	30	P30			30		36
	32	P32			32		38
	34	P34			34		40
	38	P38			38		44
	40	P40			40		46
	42	P42			42		48
	48	P48			48		54
	50	P50			50		56

■JIS B 2401 P Series (For Mounting, Dynamic)

Part Number		JIS Nominal Number	W	I.D.				Matching Material				NPF		NPB		NPSW		NPSK		NPF		NPFH		NPEG
Type	No.			do	NPA, NPB Tolerance	NPSK, NPSW, NPEG Tolerance	NPF, NPFH Tolerance	d	Tolerance	D	Tolerance	Unit Price	Volume Discount Rate	Unit Price	Volume Discount Rate	Unit Price	Volume Discount Rate	Unit Price	Volume Discount Rate	Unit Price	Volume Discount Rate	Unit Price	Volume Discount Rate	Unit Price	Volume Discount Rate
Type	No.			do	NPA, NPB Tolerance	NPSK, NPSW, NPEG Tolerance	NPF, NPFH Tolerance	d	Tolerance	D	Tolerance	1~199	200~300	1 ~ 199 pc(s).	200~300	1 ~ 199 pc(s).	200~300	1 ~ 199 pc(s).	200~300	1~199	200~300	1 ~ 199 pc(s).	200~300	1 ~ 199 pc(s).	200~300
NPA (Nitrile Rubber, Black) NPB (Nitrile Rubber, Black) NPSW (Silicon Rubber, Milky White) NPSK (Silicon Rubber, Scarlet Red) NPF (Fluoro Rubber, Black) NPFH (Fluoro Rubber, Black) NPEG (Ethylene Propylene Rubber, Black)	3	P3	1.9±0.08	2.8	±0.14	±0.21	±0.16	3	0 -0.05	6	+0.05 0
	4	P4		3.8	±0.14	±0.21	±0.16	4		7
	5	P5		4.8	±0.15	±0.22	±0.18	5		8
	6	P6		5.8	±0.15	±0.22	±0.18	6		9
	7	P7		6.8	±0.16	±0.24	±0.19	7		10
	8	P8		7.8	±0.16	±0.24	±0.19	8		11
	9	P9		8.8	±0.17	±0.25	±0.20	9		12
	10	P10		9.8				10		13
	10A	P10A	2.4±0.09	9.8				10	0 -0.06	14	+0.06 0
	11	P11		10.8	±0.18	±0.27	±0.21	11		15
	11.2	P11.2		11.0	±0.18	±0.27	±0.21	11.2		15.2
	12	P12		11.8	±0.19	±0.28	±0.22	12		16
	12.5	P12.5		12.3				12.5		16.5
	14	P14		13.8				14		18
	15	P15		14.8	±0.20	±0.30	±0.24	15		19
	16	P16		15.8	±0.20	±0.30	±0.24	16		20
	18	P18		17.8	±0.21	±0.31	±0.25	18		22
	20	P20		19.8	±0.22	±0.33	±0.26	20		24
	21	P21		20.8	±0.23	±0.34	±0.27	21		25
	22	P22		21.8	±0.24	±0.36	±0.28	22		26
	22A	P22A	3.5±0.1	21.7				22	0 -0.08	28	+0.08 0
	22.4	P22.4		22.1				22.4		28.4
	24	P24		23.7				24		30
	25	P25		24.7	±0.25	±0.37	±0.30	25		31
	25.5	P25.5		25.2	±0.25	±0.37	±0.30	25.5		31.5
	26	P26		25.7	±0.26	±0.39	±0.31	26		32
	28	P28		27.7	±0.28	±0.42	±0.33	28		34
	29	P29		28.7	±0.29	±0.43	±0.34	29		35
	29.5	P29.5		29.2				29.5		35.5
	30	P30		29.7				30		36
	31	P31		30.7	±0.30	±0.45	±0.36	31		37
	31.5	P31.5		31.2	±0.31	±0.46	±0.37	31.5		37.5
	32	P32		31.7	±0.31	±0.46	±0.37	32		38
	34	P34		33.7	±0.33	±0.49	±0.39	34		40
	35	P35		34.7	±0.34	±0.51	±0.40	35		41
	35.5	P35.5		35.2				35.5		41.5
	36	P36		35.7				36		42
	38	P38		37.7	±0.37	±0.55	±0.44	38		44
	39	P39		38.7				39		45
	40	P40		39.7				40		46
	41	P41		40.7	±0.38	±0.57	±0.45	41		47
	42	P42		41.7	±0.39	±0.58	±0.48	42		48
	44	P44		43.7	±0.41	±0.61	±0.49	44		50
	45	P45		44.7	±0.41	±0.61	±0.49	45		51
	46	P46		45.7	±0.42	±0.63	±0.50	46		52
	48	P48		47.7	±0.44	±0.66	±0.52	48		54
	50	P50		49.7	±0.45	±0.67	±0.54	50		56
	50A	P50A	5.7±0.13	49.7	±0.45	±0.67	±0.54	50	0 -0.10	60	+0.10 0
	52	P52		51.6	±0.47	±0.70	±0.56	52		62
	53	P53		52.6	±0.48	±0.72	±0.57	53		63
	55	P55		54.6	±0.49	±0.73	±0.58	55		65
	56	P56		55.6	±0.50	±0.75	±0.60	56		66
	58	P58		57.6	±0.52	±0.78	±0.62	58		68
	60	P60		59.6	±0.53	±0.79	±0.63	60		70
	62	P62		61.6	±0.55	±0.82	±0.66	62		72
	63	P63		62.6	±0.56	±0.84	±0.67	63		73
	65	P65		64.6	±0.57	±0.85	±0.68	65		75
	67	P67		66.6	±0.59	±0.88	±0.70	67		77
	70	P70		69.6	±0.61	±0.91	±0.73	70		80
	71	P71		70.6	±0.62	±0.93	±0.74	71		81
	75	P75		74.6	±0.65	±0.97	±0.78	75		85
	80	P80		79.6	±0.69	±1.03	±0.82	80		90

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Part Number
NPBR15
NPBR16
NPBR18
NPBR20
NPBR21
NPBR22
NPBR22A
NPBR24
NPBR25
NPBR26
NPBR28
NPBR30
NPBR32
NPBR34
NPBR38
NPBR40
NPBR42
NPBR48
NPBR50
NPF3
NPF4
NPF5
NPF6
NPF7
NPF8
NPF9
NPF10
NPF10A
NPF11
NPF11.2
NPF12
NPF12.5
NPF14
NPF15
NPF16
NPF18
NPF20
NPF21
NPF22
NPF22A
NPF22.4
NPF24
NPF25
NPF25.5
NPF26
NPF28
NPF29
NPF29.5
NPF30
NPF31
NPF31.5
NPF32
NPF34
NPF35
NPF35.5
NPF36
NPF38
NPF39
NPF40
NPF41

Standard Unit Price	Minimum order quantity	Volume Discount	Standard Shipping Days ?	Inner Dia. do (or d) (mm)	Wire Dia. W (mm)	Material	Application	Material Code, JIS	O.D. (Ø)	JIS Nominal Number	Applicable O-Ring Nominal Number
1.76 €	1		5 Days	15	2	[Fluororubber] Fluororesin	High Pressure Use	-	19	-	P15
1.76 €	1		5 Days	16	2	[Fluororubber] Fluororesin	High Pressure Use	-	20	-	P16
1.88 €	1		5 Days	18	2	[Fluororubber] Fluororesin	High Pressure Use	-	22	-	P18
1.88 €	1		5 Days	20	2	[Fluororubber] Fluororesin	High Pressure Use	-	24	-	P20
2.02 €	1		5 Days	21	2	[Fluororubber] Fluororesin	High Pressure Use	-	25	-	P21
2.02 €	1		5 Days	22	2	[Fluororubber] Fluororesin	High Pressure Use	-	26	-	P22
2.02 €	1		5 Days	22	3	[Fluororubber] Fluororesin	High Pressure Use	-	28	-	P22A
2.15 € 0.65 €	1		Same day Stock	24	3	[Fluororubber] Fluororesin	High Pressure Use	-	30	-	P24
2.15 €	1		5 Days	25	3	[Fluororubber] Fluororesin	High Pressure Use	-	31	-	P25
2.26 €	1		5 Days	26	3	[Fluororubber] Fluororesin	High Pressure Use	-	32	-	P26
2.26 €	1		5 Days	28	3	[Fluororubber] Fluororesin	High Pressure Use	-	34	-	P28
2.39 € 0.72 €	1		Same day Stock	30	3	[Fluororubber] Fluororesin	High Pressure Use	-	36	-	P30
2.39 €	1		5 Days	32	3	[Fluororubber] Fluororesin	High Pressure Use	-	38	-	P32
2.39 €	1		5 Days	34	3	[Fluororubber] Fluororesin	High Pressure Use	-	40	-	P34
2.52 €	1		5 Days	38	3	[Fluororubber] Fluororesin	High Pressure Use	-	44	-	P38
2.52 €	1		5 Days	40	3	[Fluororubber] Fluororesin	High Pressure Use	-	46	-	P40
2.65 €	1		5 Days	42	3	[Fluororubber] Fluororesin	High Pressure Use	-	48	-	P42
2.77 €	1		5 Days	48	3	[Fluororubber] Fluororesin	High Pressure Use	-	54	-	P48
2.77 € 0.83 €	1		Same day Stock	50	3	[Fluororubber] Fluororesin	High Pressure Use	-	56	-	P50
0.27 €	1	Available	5 Days	2.8	1.9	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P3	-
0.27 €	1	Available	5 Days	3.8	1.9	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P4	-
0.28 €	1	Available	5 Days	4.8	1.9	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P5	-
0.28 €	1	Available	Same day Stock	5.8	1.9	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P6	-
0.40 €	1	Available	Same day Stock	6.8	1.9	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P7	-
0.46 €	1	Available	Same day Stock	7.8	1.9	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P8	-
0.46 €	1	Available	Same day Stock	8.8	1.9	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P9	-
0.46 €	1	Available	Same day Stock	9.8	1.9	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P10	-
0.62 €	1	Available	5 Days	9.8	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P10A	-
0.62 €	1	Available	5 Days	10.8	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P11	-
0.62 €	1	Available	5 Days	11	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P11.2	-
0.62 €	1	Available	Same day Stock	11.8	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P12	-
0.62 €	1	Available	5 Days	12.3	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P12.5	-
0.62 €	1	Available	5 Days	13.8	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P14	-
0.68 €	1	Available	5 Days	14.8	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P15	-
0.68 €	1	Available	Same day Stock	15.8	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P16	-
0.80 €	1	Available	5 Days	17.8	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P18	-
0.80 €	1	Available	Same day Stock	19.8	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P20	-
0.98 € 0.29 €	1	Available	Same day Stock	20.8	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P21	-
0.98 €	1	Available	5 Days	21.8	2.4	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P22	-
1.43 €	1	Available	5 Days	21.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P22A	-
1.43 €	1	Available	5 Days	22.1	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P22.4	-
1.57 € 0.53 €	1	Available	Same day Stock	23.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P24	-
1.57 €	1	Available	5 Days	24.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P25	-
1.63 €	1	Available	5 Days	25.2	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P25.5	-
1.63 €	1	Available	5 Days	25.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P26	-
1.75 €	1	Available	5 Days	27.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P28	-
1.75 € 0.68 €	1	Available	Same day Stock	28.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P29	-
1.94 €	1	Available	5 Days	29.2	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P29.5	-
1.94 €	1	Available	5 Days	29.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P30	-
2.10 €	1	Available	5 Days	30.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P31	-
2.10 €	1	Available	5 Days	31.2	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P31.5	-
2.41 €	1	Available	5 Days	31.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P32	-
2.41 €	1	Available	5 Days	33.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P34	-
2.61 € 0.78 €	1	Available	Same day Stock	34.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P35	-
2.61 €	1	Available	5 Days	35.2	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P35.5	-
2.61 € 0.78 €	1	Available	Same day Stock	35.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P36	-
2.61 € 0.78 €	1	Available	Same day Stock	37.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P38	-
2.76 €	1	Available	5 Days	38.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P39	-
2.76 €	1	Available	5 Days	39.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P40	-
2.93 €	1	Available	5 Days	40.7	3.5	[Fluororubber] Fluororubber	Mineral Oil Resistant / Heat Resistant / Chemical Resistant	Class 4 D	-	P41	-

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Basic information

Type	P Series

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Basic Attributes

Inner Dia. do (or d)(mm)
2.8

3.8

4.8

5.8

6.8

7.8

8.8

9.8

10.8

11

11.8

12.3

13.8

14.8

15

15.8

16

17.8

18

19.8

20

20.8

21

21.7

21.8

22

22.1

23.7

24

24.7

25

25.2

25.7

26

27.7

28

28.7

29.2

29.7

30

30.7

31.2

31.7

32

33.7

34

34.7

35.2

35.7

37.7

38

38.7

39.7

40

40.7

41.7

42

43.7

44.7

45.7

47.7

48

49.7

50

51.6

52.6

54.6

55.6

57.6

59.6

61.6

62.6

64.6

66.6

69.6

70.6

74.6

79.6
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Wire Dia. W(mm)
1.9

2

2.4

3

3.5

5.7
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Application
- Mineral Oil Resistant
- Heat Resistant
- Abrasion Resistance
- High Pressure Use
- Chemical Resistant
- For Weather Resistance
- Cold Resistant
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JIS Nominal Number
P3

P4

P5

P6

P7

P8

P9

P10

P10A

P11

P11.2

P12

P12.5

P14

P15

P16

P18

P20

P21

P22

P22A

P22.4

P24

P25

P25.5

P26

P28

P29

P29.5

P30

P31

P31.5

P32

P34

P35

P35.5

P36

P38

P39

P40

P41

P42

P44

P45

P46

P48

P50

P50A

P52

P53

P55

P56

P58

P60

P62

P63

P65

P67

P70

P71

P75

P80
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Applicable O-Ring Nominal Number
P15

P16

P18

P20

P21

P22

P22A

P24

P25

P26

P28

P30

P32

P34

P38

P40

P42

P48

P50
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Type
- NPA
- NPB
- NPBR
- NPEG
- NPF
- NPFH
- NPSK
- NPSW
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Material
- Nitrile Rubber
- Ethylene Propylene Rubber
- Silicon Rubber
- Fluororubber
  - Fluororesin
  - Fluororubber
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