BS Aflas O-Rings | OneMonroe

British Standard O-Rings are very similar to Standard O-Rings in the fact that they are both standardized imperically. The British Standard however, incorporates some extended sizes in the 1/4" nominal cross section group for an even broader application range. British Standard O-Rings serve a variety of industries including aerospace, paint, food, and chemical transport.

This elastomer is a copolymer of Tetrafluoroethylene (TFE) and propylene. Its chemical resistance is excellent across a wide range of aggressive media.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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Inside Diameter (mm)

Item #	IntegrationID	Type	Material	Cross Section Width	Durometer	Inside Diameter	CSW Tolerance	BS Number	Call for a Quote	O-Ring Industries

BS452A AFLAS-83	N/A 187433	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 83	N/A 11.73 in297.82 mm	N/A 0.006 in0.15 mm	N/A -452A	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS451A AFLAS-83	N/A 187432	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 83	N/A 11.23 in285.12 mm	N/A 0.006 in0.15 mm	N/A -451A	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS450A AFLAS-83	N/A 187431	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 83	N/A 10.73 in272.42 mm	N/A 0.006 in0.15 mm	N/A -450A	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS449A AFLAS-83	N/A 187430	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 83	N/A 10.23 in259.72 mm	N/A 0.006 in0.15 mm	N/A -449A	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS448A AFLAS-83	N/A 187429	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 83	N/A 9.73 in247.02 mm	N/A 0.006 in0.15 mm	N/A -448A	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS447A AFLAS-83	N/A 187428	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 83	N/A 9.23 in234.32 mm	N/A 0.006 in0.15 mm	N/A -447A	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS446A AFLAS-83	N/A 187427	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 83	N/A 8.73 in221.62 mm	N/A 0.006 in0.15 mm	N/A -446A	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS445A AFLAS-83	N/A 187426	N/A BS Standard O-Ring	N/A Aflas	N/A 0.275 in6.99 mm	N/A 83	N/A 8.23 in208.92 mm	N/A 0.006 in0.15 mm	N/A -445A	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS2 AFLAS-83	N/A 187425	N/A BS Standard O-Ring	N/A Aflas	N/A 0.050 in1.27 mm	N/A 83	N/A 0.04 in1.07 mm	N/A 0.003 in0.08 mm	N/A -002	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS3 AFLAS-83	N/A 187424	N/A BS Standard O-Ring	N/A Aflas	N/A 0.075 in1.91 mm	N/A 83	N/A 0.06 in1.42 mm	N/A 0.003 in0.08 mm	N/A -003	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS4 AFLAS-83	N/A 187423	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.07 in1.78 mm	N/A 0.003 in0.08 mm	N/A -004	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS5 AFLAS-83	N/A 187422	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.10 in2.57 mm	N/A 0.003 in0.08 mm	N/A -005	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS6 AFLAS-83	N/A 187421	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.11 in2.90 mm	N/A 0.003 in0.08 mm	N/A -006	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS7 AFLAS-83	N/A 187420	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.14 in3.68 mm	N/A 0.003 in0.08 mm	N/A -007	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS8 AFLAS-83	N/A 187419	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.18 in4.47 mm	N/A 0.003 in0.08 mm	N/A -008	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS9 AFLAS-83	N/A 187418	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.21 in5.28 mm	N/A 0.003 in0.08 mm	N/A -009	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS10 AFLAS-83	N/A 187417	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.24 in6.07 mm	N/A 0.003 in0.08 mm	N/A -010	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS11 AFLAS-83	N/A 187416	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.30 in7.65 mm	N/A 0.003 in0.08 mm	N/A -011	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS12 AFLAS-83	N/A 187415	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.36 in9.25 mm	N/A 0.003 in0.08 mm	N/A -012	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS13 AFLAS-83	N/A 187414	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.43 in10.82 mm	N/A 0.003 in0.08 mm	N/A -013	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS14 AFLAS-83	N/A 187413	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.49 in12.42 mm	N/A 0.003 in0.08 mm	N/A -014	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS15 AFLAS-83	N/A 187412	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.55 in14.00 mm	N/A 0.003 in0.08 mm	N/A -015	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS16 AFLAS-83	N/A 187411	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.61 in15.6 mm	N/A 0.003 in0.08 mm	N/A -016	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS17 AFLAS-83	N/A 187410	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.68 in17.17 mm	N/A 0.003 in0.08 mm	N/A -017	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS18 AFLAS-83	N/A 187409	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 0.74 in18.77 mm	N/A 0.003 in0.08 mm	N/A -018	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.

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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
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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
8.49
8.73
8.74
8.98
8.99
9.23
9.24
9.48
9.49
9.73
9.74
9.98

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
15.24
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