U Cups

The u cup is ideal for use on linear moving shafts and piston heads, because unlike an O-ring the shape does not try to roll with the movement and create friction.

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Item#:
MA21-130X160X18

130 x 160 x 18 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-130 OD-160 HT-18
SPEC SHEET

Available:
5.00
Your Price:
28.24
Each
Item#:
MA21-140X170X18

140 x 170 x 18 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-140 OD-170 HT-18
SPEC SHEET

Available:
7.00
Your Price:
49.03
Each
Item#:
MA21-14X22X4

14 x 22 x 4 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-14 OD-22 HT-4
SPEC SHEET

Available:
68.00
Your Price:
3.34
Each
Item#:
MA21-14X22X5

14 x 22 x 5 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-14 OD-22 HT-5
SPEC SHEET

Available:
50.00
Your Price:
4.23
Each
Item#:
MA21-150X165X9

150 x 165 x 9 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-150 OD-165 HT-9
SPEC SHEET

Available:
2.00
Your Price:
22.58
Each
Item#:
MA21-160X190X22

160 x 190 x 22 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-160 OD-190 HT-22
SPEC SHEET

Available:
6.00
Your Price:
58.38
Each
Item#:
MA21-16X24X4

16 x 24 x 4 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-16 OD-24 HT-4
SPEC SHEET

Available:
51.00
Your Price:
3.45
Each
Item#:
MA21-16X32X10

16 x 32 x 10 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID- 16 OD-32 HT-10
SPEC SHEET

Available:
23.00
Your Price:
4.23
Each
Item#:
MA21-200X230X15

200 x 230 x 15 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-200 OD-230 HT-15
SPEC SHEET

Available:
5.00
Your Price:
68.47
Each
Item#:
MA21-20X28X6

20 x 28 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-20 OD-28 HT-6
SPEC SHEET

Available:
49.00
Your Price:
4.47
Each
Item#:
MA21-20X36X8

20 x 36 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-20 OD-36 HT-6
SPEC SHEET

Available:
98.00
Your Price:
6.90
Each
Item#:
MA21-210X250X20

210 x 250 x 20 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-210 OD-250 HT-20
SPEC SHEET

Available:
5.00
Your Price:
69.44
Each
Item#:
MA21-24X34X5

24 x 34 x 5 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-24 OD-34 HT-5
SPEC SHEET

Available:
10.00
Your Price:
4.23
Each
Item#:
MA21-24X40X8

24 x 40 x 8 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-24 OD-40 HT-8
SPEC SHEET

Available:
37.00
Your Price:
4.36
Each
Item#:
MA21-25X35X5

25 x 35 x 5 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-25 OD-35 HT-5
SPEC SHEET

Available:
74.00
Your Price:
4.59
Each
Item#:
MA21-270X300X22

270 x 300 x 22 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-270 OD-300 HT-22
SPEC SHEET

Available:
5.00
Your Price:
82.59
Each
Item#:
MA21-27X35X6

27 x 35 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-27 OD-35 HT-6
SPEC SHEET

Available:
22.00
Your Price:
4.80
Each
Item#:
MA21-28X40X6

28 x 40 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-28 OD-40 HT-6
SPEC SHEET

Available:
35.00
Your Price:
5.04
Each
Item#:
MA21-30X40X6

30 x 40 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-30 OD-40 HT-6
SPEC SHEET

Available:
62.00
Your Price:
4.12
Each
Item#:
MA21-30X42X10

30 x 42 x 10 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-30 OD-42 HT-10
SPEC SHEET

Available:
34.00
Your Price:
5.49
Each
Item#:
MA21-31.5X41.5X6

31.5 x 41.5 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2, MUPH, MA22, MA23, OUY

ID-31.5 OD-41.5 HT-6
SPEC SHEET

Available:
47.00
Your Price:
4.14
Each
Item#:
MA21-32X40X8

32 x 40 x 8 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-32 OD-40 HT-8
SPEC SHEET

Available:
46.00
Your Price:
5.08
Each
Item#:
MA21-35X45X6

35 x 45 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-35 OD-45 HT-6
SPEC SHEET

Available:
17.00
Your Price:
4.53
Each
Item#:
MA21-35X55X12

35 x 55 x 12 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-35 OD-55 HT-12
SPEC SHEET

Available:
18.00
Your Price:
9.15
Each
Item#:
MA21-360X400X20

360 x 400 x 20 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-360 OD-400 HT-20
SPEC SHEET

Available:
2.00
Your Price:
138.28
Each
Item#:
MA21-36X46X6

36 x 46 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-36 OD-46 HT-6
SPEC SHEET

Available:
16.00
Your Price:
6.53
Each
Item#:
MA21-38X50X6

38 x 50 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID- 38 OD-50 HT-6
SPEC SHEET

Available:
23.00
Your Price:
10.81
Each
Item#:
MA21-40X56X10

40 x 56 x 10 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-40 OD-56 HT-10
SPEC SHEET

Available:
36.00
Your Price:
9.19
Each
Item#:
MA21- 42X50X6

42 x 50 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2, MUPH, MA22, MA23, OUY

ID-42 OD-50 HT-6
SPEC SHEET

Available:
0.00
Item is no longer available.
Item#:
MA21-42X50X6

42 x 50 x 6 Symmetrical Nitrile U-Cup Metric

Alternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2, MUPH, MA22, MA23, OUY

ID-42 OD-50 HT-6
SPEC SHEET

Available:
20.00
Contact us to order
Item#:
MA21-45X60X10

45 x 60 x 10 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-45 OD-60 HT-10
SPEC SHEET

Available:
0.00
ETA:
10/23/2026
Your Price:
8.12
Each
Item#:
MA21-45X60X9

45 x 60 x 9 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID- 45 OD-60 HT-9
SPEC SHEET

Available:
24.00
Your Price:
31.54
Each
Item#:
MA21-45X65X10

45 x 65 x 10 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-45 OD-65 HT-10
SPEC SHEET

Available:
65.00
Your Price:
8.00
Each
Item#:
MA21-4X7.5X3

4 x 7.5 x 3 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-4 OD-7.5 HT-3
SPEC SHEET

Available:
19.00
Your Price:
2.66
Each
Item#:
MA21-50X60X10

50 x 60 x 10 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-50 OD-60 HT-10
SPEC SHEET

Available:
26.00
Your Price:
7.21
Each
Item#:
MA21-50X60X6

50 x 60 x 6 Symmetrical Nitrile U-Cup Metric

Hydraulic SealAlternative Seals:
Rod: MA24, C1, MURH, S8, MD, MA22
Piston: C2 , MUPH, MA22, MA23, OUY

ID-50 OD-60 HT-6
SPEC SHEET

Available:
17.00
Your Price:
5.58
Each
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