BS Aflas O-Rings | OneMonroe

OneMonroe Aflas® O-Rings offer exceptional durability and resistance, engineered for high-performance applications where standard elastomers fall short. Made from Aflas® material, these O-rings are specifically designed to withstand challenging environments with extreme temperatures, chemicals, and aggressive fluids. Their outstanding resilience against oil, steam, acids, and alkalis makes them ideal for industries such as chemical processing, oil and gas, and automotive manufacturing, where exposure to such conditions is common. OneMonroe Aflas® O-Rings provide a reliable sealing solution that maintains its integrity and performance even in the most demanding applications.

The versatility of Aflas® material allows OneMonroe O-Rings to perform exceptionally in both high- and low-temperature ranges, ranging from -10°C to 200°C (14°F to 392°F). This unique thermal resistance ensures that these O-rings can be used effectively across a wide spectrum of applications, minimizing the need for frequent replacements and maintenance. In addition to temperature resilience, Aflas® O-Rings resist a variety of chemicals and fluids, including amines, bases, acids, and hydrocarbons. Their durability and adaptability make them a cost-effective choice for industries that demand long-lasting, reliable sealing solutions under extreme conditions.

OneMonroe’s commitment to quality ensures that each Aflas® O-Ring is manufactured with precision to meet rigorous industry standards. Available in a range of sizes and thicknesses, these O-rings offer flexibility in design while maintaining consistent, dependable sealing performance. With OneMonroe Aflas® O-Rings, you can be assured of high-quality components that deliver long-term reliability, reduce downtime, and support seamless operations across industries. Trust in OneMonroe to provide O-rings that uphold the highest standards in durability, chemical resistance, and thermal stability for all your specialized sealing needs.

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	Type	Material	Cross Section Width	Durometer	Inside Diameter	CSW Tolerance	BS Number

BS546 AFLAS-75	N/A 186608	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 75	N/A 4.86 in123.44 mm	N/A 0.003 in0.08 mm	N/A -546
BS544 AFLAS-75	N/A 186609	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 75	N/A 4.61 in117.09 mm	N/A 0.003 in0.08 mm	N/A -544
BS542 AFLAS-75	N/A 186610	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 75	N/A 4.36 in110.74 mm	N/A 0.003 in0.08 mm	N/A -542
BS540 AFLAS-75	N/A 186611	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 75	N/A 4.11 in104.39 mm	N/A 0.003 in0.08 mm	N/A -540
BS538 AFLAS-75	N/A 186612	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 75	N/A 3.86 in98.04 mm	N/A 0.003 in0.08 mm	N/A -538
BS536 AFLAS-75	N/A 186613	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 75	N/A 3.61 in91.69 mm	N/A 0.003 in0.08 mm	N/A -536
BS534 AFLAS-75	N/A 186614	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 75	N/A 3.36 in85.34 mm	N/A 0.003 in0.08 mm	N/A -534
BS532 AFLAS-75	N/A 186615	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 75	N/A 3.11 in78.99 mm	N/A 0.003 in0.08 mm	N/A -532
BS519 AFLAS-75	N/A 186616	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 75	N/A 1.55 in39.45 mm	N/A 0.003 in0.08 mm	N/A -519
BS517 AFLAS-75	N/A 186617	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 75	N/A 1.43 in36.27 mm	N/A 0.003 in0.08 mm	N/A -517
BS475 AFLAS-75	N/A 186618	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 25.94 in658.88 mm	N/A 0.006 in0.15 mm	N/A -475
BS474 AFLAS-75	N/A 186619	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 24.94 in633.48 mm	N/A 0.006 in0.15 mm	N/A -474
BS473 AFLAS-75	N/A 186620	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 29.85 in758.08 mm	N/A 0.006 in0.15 mm	N/A -473
BS472 AFLAS-75	N/A 186621	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 22.94 in582.68 mm	N/A 0.006 in0.15 mm	N/A -472
BS471 AFLAS-75	N/A 186622	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 21.96 in557.66 mm	N/A 0.006 in0.15 mm	N/A -471
BS470 AFLAS-75	N/A 186623	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 20.96 in532.26 mm	N/A 0.006 in0.15 mm	N/A -470
BS469 AFLAS-75	N/A 186624	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 19.96 in506.86 mm	N/A 0.006 in0.15 mm	N/A -469
BS468 AFLAS-75	N/A 186625	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 19.46 in494.16 mm	N/A 0.006 in0.15 mm	N/A -468
BS467 AFLAS-75	N/A 186626	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 18.96 in481.46 mm	N/A 0.006 in0.15 mm	N/A -467
BS466 AFLAS-75	N/A 186627	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 18.46 in468.76 mm	N/A 0.006 in0.15 mm	N/A -466
BS465 AFLAS-75	N/A 186628	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 17.96 in456.06 mm	N/A 0.006 in0.15 mm	N/A -465
BS464 AFLAS-75	N/A 186629	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 17.46 in443.36 mm	N/A 0.006 in0.15 mm	N/A -464
BS463 AFLAS-75	N/A 186630	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 16.96 in430.66 mm	N/A 0.006 in0.15 mm	N/A -463
BS462 AFLAS-75	N/A 186631	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 16.46 in417.96 mm	N/A 0.006 in0.15 mm	N/A -462
BS461 AFLAS-75	N/A 186632	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 75	N/A 15.96 in405.26 mm	N/A 0.006 in0.15 mm	N/A -461

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No Preference
0.04
0.05
0.06
0.07
0.08
0.10
0.11
0.13
0.14
0.17
0.18
0.19
0.21
0.23
0.24
0.25
0.27
0.30
0.31
0.34
0.36
0.39
0.41
0.42
0.43
0.44
0.47
0.48
0.49
0.50
0.52
0.54
0.55
0.59
0.60
0.61
0.63
0.66
0.67
0.68
0.69
0.70
0.73
0.74
0.79
0.80
0.81
0.85
0.86
0.88
0.91
0.92
0.93
0.94
0.98
0.99
1.02
1.04
1.05
1.10
1.11
1.16
1.17
1.18
1.23
1.24
1.29
1.30
1.35
1.36
1.42
1.43
1.48
1.49
1.55
1.56
1.60
1.61
1.63
1.67
1.69
1.73
1.74
1.75
1.80
1.81
1.85
1.86
1.88
1.93
1.94
1.98
1.99
10.23
10.48
10.73
10.98
11.23
11.48
11.73
11.98
12.23
12.48
12.73
12.98
13.23
13.48
13.98
14.48
14.98
15.48
15.96
16.46
16.96
17.46
17.96
18.46
18.96
19.46
19.96
2.00
2.05
2.06
2.10
2.11
2.13
2.18
2.19
2.23
2.24
2.25
2.30
2.31
2.35
2.36
2.43
2.44
2.48
2.49
2.50
2.55
2.56
2.60
2.61
2.63
2.68
2.69
2.73
2.74
2.75
2.80
2.81
2.85
2.86
2.88
2.92
2.94
2.95
2.97
2.98
2.99
20.96
21.96
22.94
24.94
25.94
29.85
3.05
3.10
3.11
3.14
3.17
3.23
3.24
3.30
3.35
3.36
3.48
3.49
3.53
3.60
3.61
3.73
3.74
3.85
3.86
3.94
3.98
3.99
4.10
4.11
4.23
4.24
4.31
4.35
4.36
4.48
4.49
4.52
4.60
4.61
4.63
4.73
4.74
4.75
4.85
4.86
4.88
4.91
4.98
4.99
5.00
5.09
5.10
5.11
5.13
5.23
5.24
5.25
5.30
5.34
5.35
5.36
5.38
5.47
5.48
5.49
5.50
5.59
5.60
5.61
5.63
5.72
5.73
5.74
5.75
5.84
5.85
5.86
5.88
5.97
5.98
5.99
6.09
6.10
6.13
6.22
6.23
6.24
6.28
6.34
6.35
6.38
6.47
6.48
6.49
6.56
6.60
6.63
6.69
6.72
6.73
6.74
6.84
6.85
6.88
6.98
6.99
7.13
7.23
7.24
7.38
7.48
7.49
7.63
7.73
7.74
7.88
7.98
7.99
8.23
8.24
8.48
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No Preference
1.07
1.24
1.42
1.78
10.46
10.69
10.77
10.82
100.00
100.97
101.19
101.27
101.32
104.14
104.37
104.39
107.32
107.54
107.62
107.67
109.54
11.10
11.91
110.49
110.72
110.74
113.67
113.89
113.97
114.02
114.71
116.84
117.07
117.09
117.48
12.07
12.29
12.37
12.42
12.70
120.02
120.24
120.32
120.37
120.65
123.19
123.42
123.44
123.83
124.61
126.37
126.59
126.67
126.72
127.00
129.41
129.54
129.77
13.11
13.64
13.94
130.18
132.72
132.94
133.02
133.07
133.35
134.54
135.76
135.89
136.12
136.53
138.94
139.07
139.29
139.37
139.70
14.00
142.11
142.24
142.47
142.88
145.29
145.42
145.64
145.72
146.05
148.46
148.59
148.82
149.23
15.09
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15.47
15.54
15.6
15.88
151.64
151.77
151.99
152.07
154.81
154.94
155.58
157.99
158.12
158.34
158.42
159.54
16.81
161.16
161.29
161.93
164.34
164.47
164.69
164.77
166.70
167.64
168.28
17.07
17.12
17.17
17.45
17.86
170.05
170.69
170.82
171.04
171.12
173.86
173.99
174.63
177.17
177.39
177.47
18.42
18.64
18.72
18.77
180.98
183.52
183.74
183.82
187.33
189.87
19.99
190.09
190.17
193.68
196.22
196.44
196.52
2.06
2.54
2.57
2.84
2.90
20.22
20.29
20.35
20.62
200.03
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
22.23
221.62
221.84
221.92
227.97
228.19
228.27
23.16
23.39
23.47
23.52
23.80
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
25.81
253.37
253.59
259.72
26.34
26.57
26.64
26.70
266.07
266.29
27.94
272.42
278.77
278.99
28.17
28.24
28.30
285.12
29.51
29.74
29.82
29.87
291.47
291.69
297.82
3.18
3.63
3.68
304.17
304.39
31.12
31.34
31.42
31.47
310.52
316.87
32.69
32.92
32.99
323.22
329.57
329.79
33.05
335.92
34.29
34.52
34.59
34.65
342.27
354.97
355.19
36.09
36.17
36.27
367.67
37.47
37.69
37.77
37.82
380.37
380.59
39.34
39.45
39.70
393.07
4.34
4.45
4.47
4.75
40.64
40.87
40.94
405.26
41.00
41.28
417.96
42.52
42.85
43.82
430.66
44.04
44.12
44.17
44.45
443.36
45.69
456.06
46.04
46.99
468.76
47.22
47.29
47.35
47.63
48.90
481.46
49.20
494.16
5.23
5.28
5.94
50.17
50.39
50.47
50.52
50.80
506.86
52.07
52.39
53.34
53.57
53.64
53.70
53.98
532.26
55.25
55.55
557.66
56.52
56.74
56.82
56.87
57.15
58.42
58.74
582.68
59.69
59.92
59.99
6.02
6.07
6.35
6.76
61.60
61.90
62.87
63.09
63.17
63.22
63.50
633.48
64.77
65.1
658.88
66.04
66.27
66.34
66.40
66.68
67.95
68.25
69.22
69.44
69.52
69.57
69.85
7.52
7.59
7.65
7.94
71.12
71.44
72.39
72.62
72.69
72.75
73.03
74.27
74.60
74.61
75.05
75.33
75.57
75.79
75.87
75.92
758.08
77.44
78.74
78.97
78.99
79.78
8.74
80.62
81.92
82.14
82.22
82.27
83.79
85.09
85.32
85.34
88.27
88.49
88.57
88.62
89.69
9.12
9.19
9.25
9.93
91.44
91.67
91.69
94.62
94.84
94.92
94.97
97.79
98.02
98.04