AS568 PTFE O-Rings

OneMonroe’s PTFE O-Rings are designed for applications demanding unparalleled chemical resistance, extreme temperature tolerance, and longevity. Crafted from high-quality PTFE (Polytetrafluoroethylene), these O-rings are well-suited for challenging environments that would compromise other materials. The AS568 standard sizing ensures compatibility across a wide range of applications, from industrial machinery to specialized equipment in chemical processing and food manufacturing. OneMonroe’s commitment to quality means that every PTFE O-ring offers a secure, leak-proof seal that withstands high pressures, making them indispensable for rigorous applications where performance and reliability are essential.

The unique properties of PTFE make these O-rings ideal for environments exposed to aggressive chemicals, solvents, and extreme temperatures. Unlike traditional rubber or elastomer O-rings, PTFE O-rings retain their integrity in high-temperature applications, withstanding ranges from -328°F to 500°F (-200°C to 260°C). This resilience ensures that the O-rings remain effective in sealing processes under the most demanding conditions. Additionally, PTFE’s non-stick properties mean these O-rings experience minimal friction and wear, which prolongs their lifespan and helps reduce maintenance downtime.

At OneMonroe, we understand that no two projects are identical, and our extensive inventory of AS568 PTFE O-rings provides a solution for nearly every industry need. Whether you’re working in aerospace, medical technology, or heavy-duty industrial applications, our PTFE O-rings offer reliable, long-lasting performance. We prioritize quality in every O-ring we produce, ensuring each piece delivers a precise fit and secure seal. With OneMonroe’s PTFE O-rings, you gain not only an exceptional product but also a partner committed to meeting the highest standards of excellence in sealing solutions.

For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.

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Item #	IntegrationID	Cross Section Width	Durometer	Inside Diameter	Cross Section Tolerance +/-	Inside Diameter Tolerance +/-	Size Reference - AS568	Add To Cart/Request Quote

-427 PTFE	N/A 195555	N/A 0.275 in6.99 mm	N/A	N/A 120.02 mm4.725 in	N/A 0.006 in0.15 mm	N/A 0.033 in0.83 mm	N/A -427	Request Quote
-428 PTFE	N/A 195556	N/A 0.275 in6.99 mm	N/A	N/A 123.19 mm4.850 in	N/A 0.006 in0.15 mm	N/A 0.033 in0.83 mm	N/A -428	Request Quote
-429 PTFE	N/A 195557	N/A 0.275 in6.99 mm	N/A	N/A 126.37 mm4.975 in	N/A 0.006 in0.15 mm	N/A 0.037 in0.93 mm	N/A -429	Request Quote
-430 PTFE	N/A 195558	N/A 0.275 in6.99 mm	N/A	N/A 129.54 mm5.100 in	N/A 0.006 in0.15 mm	N/A 0.037 in0.93 mm	N/A -430	Request Quote
-431 PTFE	N/A 195559	N/A 0.275 in6.99 mm	N/A	N/A 132.72 mm5.225 in	N/A 0.006 in0.15 mm	N/A 0.037 in0.93 mm	N/A -431	Request Quote
-432 PTFE	N/A 195560	N/A 0.275 in6.99 mm	N/A	N/A 135.89 mm5.350 in	N/A 0.006 in0.15 mm	N/A 0.037 in0.93 mm	N/A -432	Request Quote
-433 PTFE	N/A 195561	N/A 0.275 in6.99 mm	N/A	N/A 139.07 mm5.475 in	N/A 0.006 in0.15 mm	N/A 0.037 in0.93 mm	N/A -433	Request Quote
-434 PTFE	N/A 195562	N/A 0.275 in6.99 mm	N/A	N/A 142.24 mm5.600 in	N/A 0.006 in0.15 mm	N/A 0.037 in0.93 mm	N/A -434	Request Quote
-435 PTFE	N/A 195563	N/A 0.275 in6.99 mm	N/A	N/A 145.42 mm5.725 in	N/A 0.006 in0.15 mm	N/A 0.037 in0.93 mm	N/A -435	Request Quote
-436 PTFE	N/A 195564	N/A 0.275 in6.99 mm	N/A	N/A 148.59 mm5.850 in	N/A 0.006 in0.15 mm	N/A 0.037 in0.93 mm	N/A -436	Request Quote
-437 PTFE	N/A 195565	N/A 0.275 in6.99 mm	N/A	N/A 151.77 mm5.975 in	N/A 0.006 in0.15 mm	N/A 0.037 in0.93 mm	N/A -437	Request Quote
-438 PTFE	N/A 195566	N/A 0.275 in6.99 mm	N/A	N/A 158.12 mm6.225 in	N/A 0.006 in0.15 mm	N/A 0.040 in1.01 mm	N/A -438	Request Quote
-439 PTFE	N/A 195567	N/A 0.275 in6.99 mm	N/A	N/A 164.47 mm6.475 in	N/A 0.006 in0.15 mm	N/A 0.040 in1.01 mm	N/A -439	Request Quote
-440 PTFE	N/A 195568	N/A 0.275 in6.99 mm	N/A	N/A 170.82 mm6.725 in	N/A 0.006 in0.15 mm	N/A 0.040 in1.01 mm	N/A -440	Request Quote
-441 PTFE	N/A 195569	N/A 0.275 in6.99 mm	N/A	N/A 177.17 mm6.975 in	N/A 0.006 in0.15 mm	N/A 0.040 in1.01 mm	N/A -441	Request Quote
-442 PTFE	N/A 195570	N/A 0.275 in6.99 mm	N/A	N/A 183.52 mm7.225 in	N/A 0.006 in0.15 mm	N/A 0.045 in1.14 mm	N/A -442	Request Quote
-443 PTFE	N/A 195571	N/A 0.275 in6.99 mm	N/A	N/A 189.87 mm7.475 in	N/A 0.006 in0.15 mm	N/A 0.045 in1.14 mm	N/A -443	Request Quote
-444 PTFE	N/A 195572	N/A 0.275 in6.99 mm	N/A	N/A 196.22 mm7.725 in	N/A 0.006 in0.15 mm	N/A 0.045 in1.14 mm	N/A -444	Request Quote
-445 PTFE	N/A 195573	N/A 0.275 in6.99 mm	N/A	N/A 202.57 mm7.975 in	N/A 0.006 in0.15 mm	N/A 0.045 in1.14 mm	N/A -445	Request Quote
-446 PTFE	N/A 195574	N/A 0.275 in6.99 mm	N/A	N/A 215.27 mm8.475 in	N/A 0.006 in0.15 mm	N/A 0.055 in1.40 mm	N/A -446	Request Quote
-447 PTFE	N/A 195575	N/A 0.275 in6.99 mm	N/A	N/A 227.97 mm8.975 in	N/A 0.006 in0.15 mm	N/A 0.055 in1.40 mm	N/A -447	Request Quote
-448 PTFE	N/A 195576	N/A 0.275 in6.99 mm	N/A	N/A 240.67 mm9.475 in	N/A 0.006 in0.15 mm	N/A 0.055 in1.40 mm	N/A -448	Request Quote
-449 PTFE	N/A 195577	N/A 0.275 in6.99 mm	N/A	N/A 253.37 mm9.975 in	N/A 0.006 in0.15 mm	N/A 0.055 in1.40 mm	N/A -449	Request Quote
-450 PTFE	N/A 195578	N/A 0.275 in6.99 mm	N/A	N/A 266.07 mm10.475 in	N/A 0.006 in0.15 mm	N/A 0.060 in1.52 mm	N/A -450	Request Quote
-451 PTFE	N/A 195579	N/A 0.275 in6.99 mm	N/A	N/A 278.77 mm10.975 in	N/A 0.006 in0.15 mm	N/A 0.060 in1.52 mm	N/A -451	Request Quote

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No Preference
0.74
1.07
1.24
1.42
1.78
10.46
10.69
10.77
10.82
100.97
101.19
101.27
101.32
104.14
104.37
107.32
107.54
107.62
107.67
110.49
110.72
113.67
113.89
113.97
114.02
116.84
117.07
12.07
12.29
12.37
12.42
120.02
120.24
120.32
120.37
123.19
123.42
126.37
126.59
126.67
126.72
129.54
129.77
13.64
13.87
13.94
132.72
132.94
133.02
133.07
135.89
136.12
139.07
139.29
139.37
14.00
142.24
142.47
145.42
145.64
145.72
148.59
148.82
15.24
15.47
15.54
15.60
151.77
151.99
152.07
158.12
158.34
158.42
16.81
164.47
164.69
164.77
17.04
17.12
17.17
170.82
171.04
171.12
177.17
177.39
177.47
18.42
18.64
18.72
18.77
183.52
183.74
183.82
189.87
19.99
190.09
190.17
196.22
196.44
196.52
2.06
2.57
2.84
2.90
20.22
20.29
20.35
202.57
202.79
202.87
208.92
209.14
209.22
21.59
21.82
21.89
21.95
215.27
215.49
215.57
221.62
221.84
221.92
227.97
228.19
228.27
23.16
23.39
23.47
23.52
234.32
234.54
234.62
24.77
24.99
240.67
240.89
240.97
247.02
247.24
247.32
25.07
25.12
253.37
253.59
26.34
26.57
26.64
26.70
266.07
266.29
27.94
278.77
278.99
28.17
28.24
28.30
29.51
29.74
29.82
29.87
291.47
291.69
3.63
3.68
304.17
304.39
31.12
31.34
31.42
31.47
316.87
32.69
32.92
32.99
329.55
329.57
329.79
33.05
34.29
34.52
34.59
34.65
342.27
354.97
355.19
36.09
36.17
367.67
37.47
37.69
37.77
37.82
380.37
380.59
39.34
393.07
4.34
4.42
4.47
40.64
40.87
40.94
405.26
41.00
417.96
42.52
43.82
430.66
44.04
44.12
44.17
443.36
45.69
456.06
46.99
468.76
47.22
47.29
47.35
48.90
481.46
494.16
5.23
5.28
5.94
50.17
50.39
50.47
50.52
506.86
52.07
53.34
53.57
53.64
53.70
532.26
55.25
557.66
56.52
56.74
56.82
56.87
58.42
582.65
59.69
59.92
59.99
6.02
6.07
60.05
608.10
61.60
62.87
63.09
63.17
63.22
633.50
64.77
658.85
658.88
66.04
66.27
66.34
66.40
67.95
69.22
69.44
69.52
69.57
7.52
7.59
7.65
71.12
72.39
72.62
72.69
72.75
75.57
75.79
75.87
75.92
78.74
78.97
81.92
82.14
82.22
82.27
85.09
85.32
88.27
88.49
88.57
88.62
9.12
9.19
9.25
91.44
91.67
94.62
94.84
94.92
94.97
97.79
98.02

No Preference
0.029
0.042
0.049
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0.070
0.081
0.101
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0.114
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0.171
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0.987
0.989
1.037
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1.364
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1.549
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1.612
1.614
1.674
1.725
1.734
1.737
1.739
1.799
1.850
1.859
1.862
1.864
1.925
1.975
1.984
1.987
1.989
10.475
10.484
10.975
10.984
11.475
11.484
11.975
11.984
12.475
12.975
12.984
13.475
13.975
13.984
14.475
14.975
14.984
15.475
15.955
16.455
16.955
17.455
17.955
18.455
18.955
19.455
19.955
2.050
2.100
2.109
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2.175
2.225
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2.350
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2.609
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2.675
2.725
2.734
2.737
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2.859
2.862
2.864
2.975
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2.987
2.989
20.955
21.955
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25.940
3.100
3.109
3.225
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3.237
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3.350
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3.487
3.489
3.600
3.609
3.725
3.734
3.737
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3.850
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3.984
3.987
3.989
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4.987
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5.100
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5.350
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5.600
5.609
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6.725
6.734
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6.984
6.987
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