EFC International
EFC International
1940 Craigshire St. Louis,
MO 63146-4008
Phone: 1 314.434.28881
Contact: www.efc-intl.com/contact
Website: www.efc-intl.com
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Compression Rings were originally developed for use in all types of knob-to-shaft applications on thermoplastic nobs with split hubs. They are also used as a Compression Limiter inside a bolt hole, to protect plastics from cracking when the bolt is tightened.
Compression Rings
Unit of Measure
1 2 3 4 

Item #

Item Name

Band Width (Decimal)

Inside Diameter

Material Thickness (Decimal)

18000189-01 N/A 0.362 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.362 in9.19 mm N/A 0.014 in0.36 mm
18000190-01 N/A 0.362 Inch (in) Inside Diameter Compression Ring N/A 0.125 in3.18 mm N/A 0.362 in9.19 mm N/A 0.020 in0.510 mm
18000191-01 N/A 0.370 Inch (in) Inside Diameter Compression Ring N/A 0.188 in4.78 mm N/A 0.370 in9.40 mm N/A 0.028 in0.71 mm
18000192-01 N/A 0.370 Inch (in) Inside Diameter Compression Ring N/A 0.188 in4.78 mm N/A 0.370 in9.40 mm N/A 0.031 in0.79 mm
18000193-01 N/A 0.375 Inch (in) Inside Diameter Compression Ring N/A 0.188 in4.78 mm N/A 0.375 in9.53 mm N/A 0.014 in0.36 mm
18000194-01 N/A 0.375 Inch (in) Inside Diameter Compression Ring N/A 0.438 in11.13 mm N/A 0.375 in9.53 mm N/A 0.017 in0.430 mm
18000195-01 N/A 0.375 Inch (in) Inside Diameter Compression Ring N/A 0.188 in4.78 mm N/A 0.375 in9.53 mm N/A 0.020 in0.510 mm
18000196-01 N/A 0.375 Inch (in) Inside Diameter Compression Ring N/A 0.438 in11.13 mm N/A 0.375 in9.53 mm N/A 0.020 in0.510 mm
18000197-01 N/A 0.405 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.405 in10.29 mm N/A 0.017 in0.430 mm
18000198-01 N/A 0.405 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.405 in10.29 mm N/A 0.020 in0.510 mm
18000199-01 N/A 0.440 Inch (in) Inside Diameter Compression Ring N/A 0.188 in4.78 mm N/A 0.440 in11.18 mm N/A 0.012 in0.3 mm
18000200-01 N/A 0.458 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.458 in11.63 mm N/A 0.020 in0.510 mm
18000201-01 N/A 0.468 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.468 in11.89 mm N/A 0.014 in0.36 mm
18000202-01 N/A 0.468 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.468 in11.89 mm N/A 0.017 in0.430 mm
18000203-01 N/A 0.468 Inch (in) Inside Diameter Compression Ring N/A 0.188 in4.78 mm N/A 0.468 in11.89 mm N/A 0.020 in0.510 mm
18000204-01 N/A 0.468 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.468 in11.89 mm N/A 0.020 in0.510 mm
18000205-01 N/A 0.468 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.468 in11.89 mm N/A 0.025 in0.64 mm
18000206-01 N/A 0.520 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.520 in13.21 mm N/A 0.020 in0.510 mm
18000207-01 N/A 0.538 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.538 in13.67 mm N/A 0.014 in0.36 mm
18000208-01 N/A 0.538 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.538 in13.67 mm N/A 0.017 in0.430 mm
18000209-01 N/A 0.540 Inch (in) Inside Diameter Compression Ring N/A 0.188 in4.78 mm N/A 0.540 in13.72 mm N/A 0.020 in0.510 mm
18000210-01 N/A 0.590 Inch (in) Inside Diameter Compression Ring N/A 0.188 in4.78 mm N/A 0.590 in14.99 mm N/A 0.020 in0.510 mm
18000211-01 N/A 0.596 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.596 in15.14 mm N/A 0.020 in0.510 mm
18000212-01 N/A 0.600 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.600 in15.24 mm N/A 0.020 in0.510 mm
18000213-01 N/A 0.600 Inch (in) Inside Diameter Compression Ring N/A 0.250 in6.35 mm N/A 0.600 in15.24 mm N/A 0.022 in0.56 mm
Unit of Measure
1 2 3 4