BS-1806 / BRITISH STANDARD O-RING SERIES
O-Ring are measured by in side diameter (ID) and cross section width (C.S.) dimensions are given in millimeters.
Section AA enlarged maximum flash permissible regardless of O-Ring size.
(517-807)
(809-886)
BS-1806
Actual Size Millimeters
I.D.
±
C.S.
±
O-Ring 517
36.27
0.35
1.78
0.08
O-Ring 519
39.45
0.38
1.78
0.08
O-Ring 532
79.00
0.69
1.78
0.08
O-Ring 534
85.34
0.75
1.78
0.08
O-Ring 536
91.70
0.79
1.78
0.08
O-Ring 538
98.05
0.84
1.78
0.08
O-Ring 540
104.40
0.89
1.78
0.08
O-Ring 542
110.74
0.93
1.78
0.08
O-Ring 544
117.10
0.97
1.78
0.08
O-Ring 546
123.44
1.03
1.78
0.08
O-Ring 548
129.40
1.08
1.78
0.08
O-Ring 550
135.76
1.10
1.78
0.08
O-Ring 551
138.94
1.13
1.78
0.08
O-Ring 552
142.11
1.17
1.78
0.08
O-Ring 553
145.29
1.20
1.78
0.08
O-Ring 554
148.46
1.20
1.78
0.08
O-Ring 555
151.64
1.24
1.78
0.08
O-Ring 556
154.81
1.24
1.78
0.08
O-Ring 557
158.00
1.27
1.78
0.08
O-Ring 558
161.16
1.31
1.78
0.08
O-Ring 559
164.34
1.31
1.78
0.08
O-Ring 560
167.51
1.34
1.78
0.08
O-Ring 561
170.69
1.38
1.78
0.08
O-Ring 532
173.87
1.38
1.78
0.08
O-Ring 606
1.78
0.13
1.02
0.08
O-Ring 610
6.75
0.16
1.78
0.08
O-Ring 611
8.73
0.17
1.78
0.08
O-Ring 613
9.90
0.17
2.62
0.09
O-Ring 614
11.91
0.19
2.62
0.09
O-Ring 615
13.10
0.19
2.62
0.09
O-Ring 616
15.08
0.20
2.62
0.09
O-Ring 617
17.86
0.21
2.62
0.09
O-Ring 618
25.80
0.26
3.53
0.10
O-Ring 619
74.63
0.66
5.33
0.15
O-Ring 620
79.73
0.69
5.33
0.15
O-Ring 621
89.69
0.77
5.33
0.15
O-Ring 622
100.00
0.84
5.33
0.15
O-Ring 623
109.54
0.93
5.33
0.15
O-Ring 624
114.70
0.95
6.99
0.15
O-Ring 625
124.60
1.03
6.99
0.15
O-Ring 626
134.50
1.10
6.99
0.15
O-Ring 627
159.50
1.27
6.99
0.15
O-Ring 628
166.70
1.34
6.99
0.15
O-Ring 640
74.30
0.66
2.62
0.09
O-Ring 641
77.50
0.67
2.62
0.09
O-Ring 642
80.60
0.71
2.62
0.09
O-Ring 643
83.80
0.73
2.62
0.09
O-Ring 644
155.00
1.24
5.33
0.15
O-Ring 645
161.30
1.31
5.33
0.15
O-Ring 646
167.70
1.34
5.33
0.15
O-Ring 647
174.00
1.38
5.33
0.15
O-Ring 648
310.50
2.30
6.99
0.15
O-Ring 649
323.20
2.37
6.99
0.15
O-Ring 650
335.90
2.49
6.99
0.15
O-Ring 674
208.92
1.63
6.99
0.15
O-Ring 676
221.62
1.71
6.99
0.15
O-Ring 678
234.32
1.79
6.99
0.15
O-Ring 680
247.00
1.88
6.99
0.15
O-Ring 682
259.70
1.98
6.99
0.15
O-Ring 684
272.40
2.08
6.99
0.15
O-Ring 686
285.10
2.14
6.99
0.15
O-Ring 688
297.80
2.21
6.99
0.15
O-Ring 801
3.17
0.14
1.78
0.08
O-Ring 802
4.76
0.15
1.78
0.08
O-Ring 803
6.35
0.16
1.78
0.08
O-Ring 804
7.94
0.16
1.78
0.08
O-Ring 806
11.11
0.18
1.78
0.08
O-Ring 807
12.70
0.19
2.62
0.09
BS-1806
Actual Size Millimeters
I.D.
±
C.S.
±
O-Ring 809
15.88
0.20
2.62
0.09
O-Ring 810
17.46
0.21
2.62
0.09
O-Ring 812
20.64
0.23
2.62
0.09
O-Ring 813
22.23
0.24
2.62
0.09
O-Ring 814
23.81
0.25
2.62
0.09
O-Ring 824
39.70
0.38
3.53
0.10
O-Ring 825
41.28
0.40
3.53
0.10
O-Ring 826
43.86
0.42
3.53
0.10
O-Ring 827
44.95
0.42
3.53
0.10
O-Ring 828
46.04
0.43
3.53
0.10
O-Ring 829
47.62
0.45
3.53
0.10
O-Ring 830
49.20
0.46
3.53
0.10
O-Ring 831
50.80
0.47
3.53
0.10
O-Ring 832
52.40
0.48
3.53
0.10
O-Ring 833
53.97
0.50
3.53
0.10
O-Ring 834
55.56
0.51
3.53
0.10
O-Ring 835
57.15
0.52
3.53
0.10
O-Ring 836
58.74
0.54
3.53
0.10
O-Ring 837
60.32
0.55
3.53
0.10
O-Ring 838
61.90
0.56
3.53
0.10
O-Ring 839
63.50
0.58
3.53
0.10
O-Ring 840
65.10
0.59
3.53
0.10
O-Ring 841
66.67
0.59
3.53
0.10
O-Ring 842
68.26
0.61
3.53
0.10
O-Ring 843
69.85
0.63
3.53
0.10
O-Ring 844
71.44
0.64
3.53
0.10
O-Ring 845
73.02
0.66
3.53
0.10
O-Ring 846
74.60
0.66
3.53
0.10
O-Ring 860
117.48
0.97
5.33
0.10
O-Ring 861
120.65
1.00
5.33
0.10
O-Ring 862
123.83
1.03
5.33
0.10
O-Ring 863
127.00
1.05
5.33
0.10
O-Ring 864
130.18
1.08
5.33
0.10
O-Ring 865
133.35
1.10
5.33
0.10
O-Ring 866
136.53
1.13
5.33
0.10
O-Ring 867
139.70
1.13
5.33
0.10
O-Ring 868
142.88
1.17
5.33
0.10
O-Ring 869
146.05
1.20
5.33
0.10
O-Ring 870
146.23
1.20
5.33
0.10
O-Ring 872
155.60
1.27
6.99
0.15
O-Ring 874
161.90
1.31
6.99
0.15
O-Ring 876
168.30
1.34
6.99
0.15
O-Ring 878
174.60
1.38
6.99
0.15
O-Ring 880
181.00
1.44
6.99
0.15
O-Ring 882
187.30
1.48
6.99
0.15
O-Ring 884
193.70
1.51
6.99
0.15
O-Ring 886
200.00
1.55
6.99
0.15
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