Rubber Seals

Standard Types of Rubber Seals

Rubber Seals Manufactured in BUNA N rubber for superior resistance to water swell, steam and abrasion.

Sizing Chart for Rubber Seals

The O-ring sizes that are included on this site are those of AS 568A, “Aerospace Size Standard for O-Rings”, which is generally considered to be the US size standard. However, many other sizes, both metric and nonstandard, are available. The O-Rings in the following charts are grouped by cross section (C/S) and by ascending inside diameter (I.D.). Tolerances are per industry standards.

Part Number Dimensions (Inches) NSF Approved?
  I.D. ± C/S  
01-002 0.042 0.004 0.07 Y
01-007 0.145 0.005 0.07 Y
01-008 0.176 0.005 0.07 Y
01-009 0.208 0.005 0.07 Y
01-010 0.239 0.005 0.07 Y
01-011 0.301 0.005 0.07 Y
01-012 0.364 0.005 0.07 Y
01-014 0.489 0.005 0.07 Y
01-015 0.551 0.007 0.07 Y
01-018 0.739 0.009 0.07 Y
03-018 0.739 0.009 0.07 Y
01-019 0.801 0.009 0.07 Y
01-026 1.239 0.011 0.07 Y
01-029 1.489 0.013 0.07 Y
02-106 0.174 0.005 0.103 N
03-108 0.237 0.005 0.103 Y
01-109 0.299 0.005 0.103 Y
01-110 0.362 0.005 0.103 Y
01-111 0.424 0.005 0.103 Y
01-112 0.487 0.005 0.103 Y
01-122 1.112 0.012 0.103 Y
01-123 1.174 0.012 0.103 Y
01-206 0.484 0.007 0.139 Y
01-218 1.234 0.012 0.139 Y
01-220 1.359 0.012 0.139 Y
01-234 2.984 0.024 0.139 Y
01-235 3.109 0.024 0.139 Y
03-264 7.484 0.045 0.139 Y
01-318 0.975 0.01 0.21 Y
01-326 1.6 0.015 0.21 Y
01-328 1.85 0.015 0.21 Y
01-337 2.975 0.024 0.21 Y