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

BS44 AFLAS-83	N/A 187383	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 3.74 in94.97 mm	N/A 0.003 in0.08 mm	N/A -044	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS45 AFLAS-83	N/A 187382	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 3.99 in101.32 mm	N/A 0.003 in0.08 mm	N/A -045	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS46 AFLAS-83	N/A 187381	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 4.24 in107.67 mm	N/A 0.003 in0.08 mm	N/A -046	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS47 AFLAS-83	N/A 187380	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 4.49 in114.02 mm	N/A 0.003 in0.08 mm	N/A -047	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS48 AFLAS-83	N/A 187379	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 4.74 in120.37 mm	N/A 0.003 in0.08 mm	N/A -048	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS49 AFLAS-83	N/A 187378	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 4.99 in126.72 mm	N/A 0.003 in0.08 mm	N/A -049	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS50 AFLAS-83	N/A 187377	N/A BS Standard O-Ring	N/A Aflas	N/A 0.070 in1.78 mm	N/A 83	N/A 5.24 in133.07 mm	N/A 0.003 in0.08 mm	N/A -050	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS102 AFLAS-83	N/A 187376	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.05 in1.24 mm	N/A 0.003 in0.08 mm	N/A -102	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS103 AFLAS-83	N/A 187375	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.08 in2.06 mm	N/A 0.003 in0.08 mm	N/A -103	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS104 AFLAS-83	N/A 187374	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.11 in2.84 mm	N/A 0.003 in0.08 mm	N/A -104	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS105 AFLAS-83	N/A 187373	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.14 in3.63 mm	N/A 0.003 in0.08 mm	N/A -105	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS106 AFLAS-83	N/A 187372	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.18 in4.45 mm	N/A 0.003 in0.08 mm	N/A -106	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS107 AFLAS-83	N/A 187371	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.21 in5.23 mm	N/A 0.003 in0.08 mm	N/A -107	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS108 AFLAS-83	N/A 187370	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.24 in6.02 mm	N/A 0.003 in0.08 mm	N/A -108	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS109 AFLAS-83	N/A 187369	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.30 in7.59 mm	N/A 0.003 in0.08 mm	N/A -109	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS110 AFLAS-83	N/A 187368	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.36 in9.19 mm	N/A 0.003 in0.08 mm	N/A -110	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS111 AFLAS-83	N/A 187367	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.42 in10.77 mm	N/A 0.003 in0.08 mm	N/A -111	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS112 AFLAS-83	N/A 187366	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.49 in12.37 mm	N/A 0.003 in0.08 mm	N/A -112	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS113 AFLAS-83	N/A 187365	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.55 in13.94 mm	N/A 0.003 in0.08 mm	N/A -113	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS114 AFLAS-83	N/A 187364	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.61 in15.54 mm	N/A 0.003 in0.08 mm	N/A -114	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS115 AFLAS-83	N/A 187363	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.67 in17.12 mm	N/A 0.003 in0.08 mm	N/A -115	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS116 AFLAS-83	N/A 187362	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.74 in18.72 mm	N/A 0.003 in0.08 mm	N/A -116	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS117 AFLAS-83	N/A 187361	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.80 in20.29 mm	N/A 0.003 in0.08 mm	N/A -117	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS118 AFLAS-83	N/A 187360	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.86 in21.89 mm	N/A 0.003 in0.08 mm	N/A -118	N/A	N/A O-rings are used in the military, automotive, aerospace and agriculture industries.
BS119 AFLAS-83	N/A 187359	N/A BS Standard O-Ring	N/A Aflas	N/A 0.103 in2.62 mm	N/A 83	N/A 0.92 in23.47 mm	N/A 0.003 in0.08 mm	N/A -119	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
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
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