BS1806 O-Ring Sizes

BS1806 Size Internal Diameter   (mm)

Cross Section (mm)

Internal Diameter (inch)

Cross Section 

(inch)

Nom. Shaft Diameter  (inch) Nom. Bore Diameter  (inch) Nom. Groove Cross Section (inch)
BS1806-001 0.74 1.02 0.029 0.040      
BS1806-002 1.07 1.27 0.042 0.050      
BS1806-003 1.42 1.52 0.056 0.060      
BS1806-004 1.78 1.78 0.070 0.070 5/64 13/64 1/16
BS1806-005 2.57 1.78 0.101 0.070 7/64 15/64 1/16
BS1806-006 2.9 1.78 0.114 0.070 1/8 1/4 1/16
BS1806-007 3.69 1.78 0.145 0.070 5/32 9/32 1/16
BS1806-008 4.47 1.78 0.176 0.070 3/16 5/16 1/16
BS1806-009 5.28 1.78 0.208 0.070 7/32 11/32 1/16
BS1806-010 6.07 1.78 0.239 0.070 1/4 3/8 1/16
BS1806-011 7.65 1.78 0.301 0.070 5/16 7/16 1/16
BS1806-012 9.25 1.78 0.364 0.070 3/8 1/2 1/16
BS1806-013 10.82 1.78 0.426 0.070 7/16 9/16 1/16
BS1806-014 12.42 1.78 0.489 0.070 1/2 5/8 1/16
BS1806-015 14 1.78 0.551 0.070 9/16 11/16 1/16
BS1806-016 15.6 1.78 0.614 0.070 5/8 3/4 1/16
BS1806-017 17.16 1.78 0.676 0.070 11/16 13/16 1/16
BS1806-018 18.77 1.78 0.739 0.070 3/4 7/8 1/16
BS1806-019 20.35 1.78 0.801 0.070 13/16 15/16 1/16
BS1806-020 21.95 1.78 0.864 0.070 7/8 1 1/16
BS1806-021 23.52 1.78 0.926 0.070 15/16 1 1/16 1/16
BS1806-022 25.12 1.78 0.989 0.070 1 1 1/8 1/16
BS1806-023 26.7 1.78 1.051 0.070 1 1/16 1 3/16 1/16
BS1806-024 28.3 1.78 1.114 0.070 1 1/8 1 1/4 1/16
BS1806-025 29.87 1.78 1.176 0.070 1 3/16 1 5/16 1/16
BS1806-026 31.47 1.78 1.239 0.070 1 1/4 1 3/8 1/16
BS1806-027 33.05 1.78 1.301 0.070 1 5/16 1 7/16 1/16
BS1806-028 34.65 1.78 1.364 0.070 1 3/8 1 1/2 1/16
BS1806-029 37.82 1.78 1.489 0.070 1 1/2 1 5/8 1/16
BS1806-030 41 1.78 1.614 0.070 1 5/8 1 3/4 1/16
BS1806-031 44.17 1.78 1.739 0.070 1 3/4 1 7/8 1/16
BS1806-032 47.35 1.78 1.864 0.070 1 7/8 2 1/16
BS1806-033 50.52 1.78 1.989 0.070 2 2 1/8 1/16
BS1806-034 53.7 1.78 2.114 0.070 2 1/8 2 1/4 1/16
BS1806-035 56.87 1.78 2.239 0.070 2 1/4 2 3/8 1/16
BS1806-036 60.04 1.78 2.364 0.070 2 3/8 2 1/2 1/16
BS1806-037 63.22 1.78 2.489 0.070 2 1/2 2 5/8 1/16
BS1806-038 66.4 1.78 2.614 0.070 2 5/8 2 3/4 1/16
BS1806-039 69.57 1.78 2.739 0.070 2 3/4 2 7/8 1/16
BS1806-040 72.75 1.78 2.864 0.070 2 7/8 3 1/16
BS1806-041 75.92 1.78 2.989 0.070 3 3 1/8 1/16
BS1806-042 82.27 1.78 3.239 0.070 3 1/4 3 3/8 1/16
BS1806-043 88.62 1.78 3.489 0.070 3 1/2 3 5/8 1/16
BS1806-044 94.97 1.78 3.739 0.070 3 3/4 3 7/8 1/16
BS1806-045 101.32 1.78 3.989 0.070 4 4 1/8 1/16
BS1806-046 107.67 1.78 4.239 0.070 4 1/4 4 3/8 1/16
BS1806-047 114.02 1.78 4.489 0.070 4 1/2 4 5/8 1/16
BS1806-048 120.37 1.78 4.739 0.070 4 3/4 4 7/8 1/16
BS1806-049 126.72 1.78 4.989 0.070 5 5 1/8 1/16
BS1806-050 133.07 1.78 5.239 0.070 5 1/4 5 3/8 1/16
BS1806-102 1.24 2.62 0.049 0.103 1/16 1/4 3/32
BS1806-103 2.06 2.62 0.081 0.103 3/32 9/32 3/32
BS1806-104 2.84 2.62 0.112 0.103 1/8 5/16 3/32
BS1806-105 3.63 2.62 0.143 0.103 5/32 11/32 3/32
BS1806-106 4.42 2.62 0.174 0.103 3/16 3/8 3/32
BS1806-107 5.23 2.62 0.206 0.103 7/32 13/32 3/32
BS1806-108 6.02 2.62 0.237 0.103 1/4 7/16 3/32
BS1806-109 7.59 2.62 0.299 0.103 5/16 1/2 3/32
BS1806-110 9.19 2.62 0.362 0.103 3/8 9/16 3/32
BS1806-111 10.77 2.62 0.424 0.103 7/16 5/8 3/32
BS1806-112 12.37 2.62 0.487 0.103 1/2 11/16
O-ring ISO3601
O-ring BS4518
O-ring BS1806

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