Mr. O-Ring Kits
O-Ring Kits

Optimizing organization and preparedness in maintenance, repair, and assembly work, Mr. O-Ring’s assortment of o-ring kits offers a particular solution for various applications. Our kits are thoughtfully assembled to ensure you have the necessary seals at your fingertips, reducing downtime and increasing efficiency. Each kit contains a selection of the most commonly used sizes and materials designed to meet the specialized fitting standards and industry demands.
Boss, Face, and Flange Kits
Our Boss kits are indispensable for sealing hydraulic tube fittings in high-pressure environments. These kits are equipped with o-rings in Nitrile, Viton, and EPDM materials and align with the AS568 900 series classification. They are specifically designed for straight thread tube boss fittings (ORB) and are crucial for maintaining seal integrity in hydraulic systems.
Boss Kit
| AS568 Dash # | Kit QTY | Tube OD | CS (in) | ID (in) |
|---|---|---|---|---|
| 904 | 30 | 1/4 | 0.072 | 0.351 |
| 905 | 30 | 5/16 | 0.072 | 0.414 |
| 906 | 30 | 3/8 | 0.078 | 0.468 |
| 908 | 30 | 1/2 | 0.087 | 0.644 |
| 910 | 30 | 5/8 | 0.097 | 0.755 |
| 912 | 30 | 3/4 | 0.116 | 0.924 |
| 914 | 20 | 7/8 | 0.116 | 1.047 |
| 916 | 20 | 1 | 0.116 | 1.355 |
| 920 | 10 | 1-1/4 | 0.118 | 1.475 |
| 924 | 10 | 1-1/2 | 0.118 | 1.720 |
| 932 | 10 | 2 | 0.118 | 2.337 |
The Face Seal Kit includes o-rings that ensure a tight seal for o-ring face seal fittings (ORFS) in hydraulic systems. Offered in Nitrile and Viton materials, they are perfectly suited for applications where metal-to-metal contact occurs, adhering to the AS568 Zero Series Classification. These seals play a pivotal role in the effectiveness and safety of hydraulic connections.
Face Kit
| AS568 Dash # | Kit QTY | ORS Tube Size | CS (in) | ID (in) |
|---|---|---|---|---|
| 011 | 25 | -4 | 0.070 | 0.301 |
| 012 | 25 | -6 | 0.070 | 0.364 |
| 014 | 25 | -8 | 0.070 | 0.489 |
| 016 | 25 | -10 | 0.070 | 0.614 |
| 018 | 25 | -12 | 0.070 | 0.739 |
| 021 | 25 | -16 | 0.070 | 0.926 |
| 025 | 25 | -20 | 0.070 | 1.176 |
| 029 | 25 | -24 | 0.070 | 1.489 |
Our Flange Kits are designed to secure high-pressure fluid system connections in equipment such as pipes, pumps, and valves. The kits offer o-rings made from durable materials like Nitrile and Viton, corresponding to the AS568 200 series classification. They provide the necessary sealing capabilities for SAE 4-bolt flange applications and can be easily disassembled for maintenance or inspection.
Flange Kit
| AS568 Dash # | Kit QTY | SAE Flange Size | Tubing Dash Size | CS (in) | ID (in) |
|---|---|---|---|---|---|
| 210 | 20 | 1/2 | -8 | 0.139 | 0.734 |
| 214 | 20 | 3/4 | -12 | 0.139 | 0.984 |
| 219 | 20 | 1 | -16 | 0.139 | 1.296 |
| 222 | 20 | 1-1/4 | -20 | 0.139 | 1.484 |
| 225 | 10 | 1-1/2 | -24 | 0.139 | 1.859 |
| 228 | 10 | 2 | -32 | 0.139 | 2.234 |
| 232 | 10 | 2-1/2 | -40 | 0.139 | 2.734 |
12 Size Kits
The 12-size kit provides a well-rounded selection of 200 o-rings across 12 popular sizes, featuring Nitrile, Viton, Silicone, EPDM, and AFLAS material options. Adhering to AS568 universal series standards, this kit is a cost-effective solution for maintaining a variety of essential seals.
AS568 12 Size Kit
| AS568 Dash # | Kit QTY | CS (Nom) | ID (Nom) | OD | CS (in) | ID (in) |
|---|---|---|---|---|---|---|
| 010 | 35 | 1/16 | 1/4 | 3/8 | 0.070 | 0.239 |
| 011 | 35 | 1/16 | 5/16 | 7/16 | 0.070 | 0.301 |
| 012 | 25 | 1/16 | 3/8 | 1/2 | 0.070 | 0.364 |
| 110 | 25 | 3/32 | 3/8 | 9/16 | 0.103 | 0.362 |
| 111 | 15 | 3/32 | 7/16 | 5/8 | 0.103 | 0.424 |
| 112 | 10 | 3/32 | 1/2 | 11/16 | 0.103 | 0.487 |
| 113 | 10 | 3/32 | 9/16 | 3/4 | 0.103 | 0.549 |
| 114 | 10 | 3/32 | 5/8 | 13/16 | 0.103 | 0.612 |
| 115 | 10 | 3/32 | 11/16 | 7/8 | 0.103 | 0.674 |
| 116 | 10 | 3/32 | 3/4 | 15/16 | 0.103 | 0.737 |
| 211 | 8 | 1/8 | 13/16 | 1-1/16 | 0.139 | 0.796 |
| 212 | 7 | 1/8 | 7/8 | 1-1/8 | 0.139 | 0.859 |
30 Size Kits
Our 30-size kits are available in three variations to accommodate different sizing standards: AS568, Metric, and JIS.
The AS568 30 Size Kit includes 382 o-rings in the most commonly utilized sizes for general use, available in Nitrile, Viton, SIlicone, and EPDM.
AS568 30 Size Kit
| AS568 Dash # | Kit QTY | CS (Nom) | ID (Nom) | OD | CS (in) | ID (in) |
|---|---|---|---|---|---|---|
| 006 | 20 | 1/16 | 1/8 | 1/4 | .070″ | .114″ |
| 007 | 20 | 1/16 | 5/32 | 9/32 | .070″ | .145″ |
| 008 | 20 | 1/16 | 3/16 | 5/16 | .070″ | .176″ |
| 009 | 20 | 1/16 | 7/32 | 11/32 | .070″ | .208″ |
| 010 | 20 | 1/16 | 1/4 | 3/8 | .070″ | .239″ |
| 011 | 20 | 1/16 | 5/16 | 7/16 | .070″ | .301″ |
| 012 | 20 | 1/16 | 3/8 | 1/2 | .070″ | .364″ |
| 110 | 13 | 3/32 | 3/8 | 9/16 | .103″ | .362″ |
| 111 | 13 | 3/32 | 7/16 | 5/8 | .103″ | .424″ |
| 112 | 13 | 3/32 | 1/2 | 11/16 | .103″ | .487″ |
| 113 | 13 | 3/32 | 9/16 | 3/4 | .103″ | .549″ |
| 114 | 13 | 3/32 | 5/8 | 13/16 | .103″ | .612″ |
| 115 | 13 | 3/32 | 11/16 | 7/8 | .103″ | .674″ |
| 116 | 13 | 3/32 | 3/4 | 15/16 | .103″ | .737″ |
| 210 | 10 | 1/8 | 3/4 | 1 | .139″ | .734″ |
| 211 | 10 | 1/8 | 13/16 | 1-1/16 | .139″ | .796″ |
| 212 | 10 | 1/8 | 7/8 | 1-1/8 | .139″ | .859″ |
| 213 | 10 | 1/8 | 15/16 | 1-3/16 | .139″ | .921″ |
| 214 | 10 | 1/8 | 1 | 1-1/4 | .139″ | .984″ |
| 215 | 10 | 1/8 | 1-1/16 | 1-5/16 | .139″ | 1.046″ |
| 216 | 10 | 1/8 | 1-1/8 | 1-3/8 | .139″ | 1.109″ |
| 217 | 10 | 1/8 | 1-3/16 | 1-7/16 | .139″ | 1.171″ |
| 218 | 10 | 1/8 | 1-1/4 | 1-1/2 | .139″ | 1.234″ |
| 219 | 10 | 1/8 | 1-5/16 | 1-9/16 | .139″ | 1.296″ |
| 220 | 10 | 1/8 | 1-3/8 | 1-5/8 | .139″ | 1.359″ |
Showing 1–25 of 30 rows
Our Metric 30-Size Kit comprises of 386 o-rings and is tailored for industrial and automotive applications, with material options including Nitrile and Viton.
Metric 30 Size Kit
| Size | Kit QTY | CS | ID |
|---|---|---|---|
| 2.00X003 | 16 | 2 | 3 |
| 2.00X004 | 16 | 2 | 4 |
| 2.00X005 | 16 | 2 | 5 |
| 2.00X006 | 16 | 2 | 6 |
| 2.00X007 | 16 | 2 | 7 |
| 2.00X008 | 16 | 2 | 8 |
| 2.00X010 | 16 | 2 | 10 |
| 2.50X010 | 13 | 2.5 | 10 |
| 2.50X011 | 13 | 2.5 | 11 |
| 2.50X012 | 13 | 2.5 | 12 |
| 2.50X014 | 13 | 2.5 | 14 |
| 2.50X016 | 13 | 2.5 | 16 |
| 2.50X017 | 13 | 2.5 | 17 |
| 2.50X019 | 13 | 2.5 | 19 |
| 3.00X019 | 12 | 3 | 19 |
| 3.00X020 | 12 | 3 | 20 |
| 3.00X022 | 12 | 3 | 22 |
| 3.00X024 | 12 | 3 | 24 |
| 3.00X025 | 12 | 3 | 25 |
| 3.00X027 | 12 | 3 | 27 |
| 3.00X028 | 12 | 3 | 28 |
| 3.00X030 | 12 | 3 | 30 |
| 3.00X032 | 12 | 3 | 32 |
| 3.00X033 | 12 | 3 | 33 |
| 3.00X035 | 12 | 3 | 35 |
Showing 1–25 of 30 rows
With 391 pieces in popular Japanese Industrial metric sizes, our 30-size JIS kit is available in Nitrile and Viton materials, catering to equipment and machinery adhering to JIS standards.
JIS 30 Size Kit
| JIS Size | Kit QTY | CS | ID |
|---|---|---|---|
| P3 | 18 | 1.90 | 2.80 |
| P4 | 18 | 1.90 | 3.80 |
| P5 | 18 | 1.90 | 4.80 |
| P6 | 18 | 1.90 | 5.80 |
| P7 | 18 | 1.90 | 6.80 |
| P8 | 18 | 1.90 | 7.80 |
| P9 | 18 | 1.90 | 8.80 |
| P10A | 14 | 2.40 | 9.80 |
| P11 | 14 | 2.40 | 10.80 |
| P12 | 14 | 2.40 | 11.80 |
| P14 | 14 | 2.40 | 13.80 |
| P16 | 14 | 2.40 | 15.80 |
| P18 | 14 | 2.40 | 17.80 |
| P20 | 14 | 2.40 | 19.80 |
| G20 | 11 | 3.00 | 20.00 |
| G22 | 11 | 3.00 | 20.00 |
| P22.4 | 10 | 3.50 | 22.10 |
| G25 | 11 | 3.10 | 24.40 |
| P25 | 10 | 3.50 | 24.70 |
| P26 | 10 | 3.50 | 25.70 |
| G30 | 11 | 3.10 | 29.40 |
| P30 | 10 | 3.50 | 29.70 |
| P32 | 10 | 3.50 | 31.70 |
| P34 | 10 | 3.50 | 33.70 |
| G35 | 11 | 3.10 | 34.40 |
Showing 1–25 of 30 rows