JIS B2401 Silicone O-Ring
Manufacturer & Custom Solutions
JIS B2401 Silicone O-Ring
ZSR Silicone produces JIS B2401 silicone O-rings in the P series, G series and more. Whether you need seals for moving piston and rod assemblies or for fixed sealing surfaces, we offer a selection of silicone materials to match the exact JIS B2401 size your equipment requires.
FDA 21 CFR 177.2600
Rubber Articles Intended for Repeated Use
LFGB 30&31
EU Food Contact Materials
USP Class VI / ISO 10993
Biocompatibility of Medical Devices
RoHS / REACH
Environmental Compliance
UL 94
Flammability of Plastic Materials
Built to Your Exact Spec
Custom Silicone O-ring Options
| Image | Product | Type | Short Info | Action |
|---|---|---|---|---|
 | ISO 3601 Metric Silicone O-Rings | Standard & Size | Metric silicone O-rings manufactured to ISO 3601 dimensions. Fits international equipment groove standards. | View Details |
 | ISO 6149 Metric Silicone O-Rings | Standard & Size | Metric O-rings designed for hydraulic and pneumatic fluid power sealing applications under ISO 6149 standards. | View Details |
 | BS 1806 Silicone O-rings | Standard & Size | British Standard inch-size silicone O-rings. Common in UK and Commonwealth industrial equipment. | View Details |
 | DIN 3771 Silicone O-rings | Standard & Size | German metric standard O-rings for hydraulic and pneumatic sealing in European machinery. | View Details |
 | Custom Molded Silicone O-rings | Standard & Size | Custom-shaped silicone O-rings molded to your exact drawing or sample. No standard size limitations. | View Details |
 | AS568 Silicone O-rings | Standard & Size | Inch-size silicone O-rings that follow the AS568 standard. Widely used in North American machinery and hydraulic systems. | View Details |
 | AN6227 Silicone O-rings | Standard & Size | Aerospace-standard O-rings with small cross-section. Used in aviation and military-grade sealing. | View Details |
 | AN6230 Silicone O-rings | Standard & Size | Aerospace-standard O-rings specified under AN6230 for aviation and military-grade sealing. | View Details |
 | JIS B2401 Silicone O-Ring | Standard & Size | Japanese industrial standard O-rings commonly used in Asian-manufactured machinery and automotive equipment. | View Details |
 | FDA Food Grade Silicone O-Rings | Grade | Food-safe silicone O-rings compliant with FDA regulations. Safe for repeated food contact. | View Details |
 | Industrial Grade Silicone O-ring | Grade | General-purpose silicone O-rings for industrial sealing. Cost-effective with reliable performance. | View Details |
 | Medical Grade Silicone O-ring | Grade | Biocompatible silicone O-rings for medical devices. Passes USP Class VI and supports sterilization. | View Details |
 | Oil-Resistant / Fuel-Resistant Silicone O-Rings | Special Function | Modified silicone O-rings that resist swelling in oils, fuels and petroleum-based fluids. | View Details |
 | Metal Detectable Silicone O-Rings | Special Function | Food-safe silicone O-rings with metal-detectable additives. Protects production lines from contamination. | View Details |
 | High Temperature / Heat Resistant Silicone O-Rings | Special Function | Silicone O-rings that stay flexible at temperatures above 200°C. For ovens, engines and furnaces. | View Details |
 | VMQ Silicone O-Rings | Materials | Heat and cold-resistant silicone O-rings for food, medical, automotive, and industrial applications. | View Details |
 | Fiberglass Reinforced Silicone O-rings | Materials | High-strength silicone O-rings reinforced with fiberglass fabric. Withstands extreme heat and pressure. | View Details |
 | HCR / HTV / Solid Silicone Rubber O-rings | Materials | Durable solid silicone rubber O-rings made by compression molding. The standard choice for general sealing. | View Details |
 | Liquid Silicone Rubber (LSR) O-rings | Materials | Injection-molded liquid silicone rubber O-rings with tight tolerances and clean surfaces. Ideal for high-volume production. | View Details |
 | Platinum Cured Silicone O-rings | Materials | Ultra-clean silicone O-rings cured with platinum catalyst. Lower extractables for food and medical use. | View Details |
 | Fluorosilicone (FVMQ) O-rings | Materials | Fuel and oil-resistant silicone O-rings for aerospace, automotive and chemical applications. | View Details |
 | Transparent / Clear Silicone O-rings | Color | See-through silicone O-rings for visual inspection and clean-looking medical or food equipment. | View Details |
 | Black / White Silicone O-Rings | Color | Standard black and white silicone O-rings. The most common colors for industrial and food-grade applications. | View Details |
 | Pantone Colors Silicone O-rings | Color | Silicone O-rings in any Pantone color for branding, color-coding or aesthetic requirements. | View Details |
 | Custom Colors Silicone O-rings | Color | Silicone O-rings matched to your exact color sample or specification. | View Details |
Simple JIS B2401 Silicone O-Ring Size Chart
JIS B2401 Standard No. Range | CS (mm) | ID Range (mm) | OD Range (mm) | CS (inch) | ID Range (inch) | OD Range (inch) |
|---|---|---|---|---|---|---|
S3~22 | 1.50 | 2.50 ~ 21.50 | 5.50 ~ 24.50 | 0.059 | 0.098 ~ 0.846 | 0.217 ~ 0.965 |
S22.4~150 | 2.00 | 21.90 ~ 149.50 | 25.90 ~ 153.50 | 0.079 | 0.862 ~ 5.886 | 1.020 ~ 6.043 |
P3~10 | 1.90 | 2.80 ~ 9.80 | 6.60 ~ 13.60 | 0.075 | 0.110 ~ 0.386 | 0.260 ~ 0.535 |
P10~22 | 2.40 | 9.80 ~ 21.80 | 14.60 ~ 26.60 | 0.094 | 0.386 ~ 0.858 | 0.575 ~ 1.047 |
P22~50 | 3.50 | 21.70 ~ 49.70 | 28.70 ~ 56.70 | 0.138 | 0.854 ~ 1.957 | 1.130 ~ 2.232 |
G20~145 | 3.10 | 19.40 ~ 144.40 | 25.60 ~ 150.60 | 0.122 | 0.764 ~ 5.685 | 1.008 ~ 5.929 |
V10~15, V24, V34, V40, V55~58, V70, V85, V100, V120, V140, V150, V175 | 4.00 | 9.50 ~ 173.00 | 17.50 ~ 181.00 | 0.157 | 0.374 ~ 6.811 | 0.689 ~ 7.126 |
P48~150 | 5.70 | 47.60 ~ 149.60 | 59.00 ~ 161.00 | 0.224 | 1.874 ~ 5.890 | 2.323 ~ 6.339 |
G150~500, G510, G520~560, G570, G580~590, G600~605, G615~620, G630, G860, G910 | 5.70 | 149.30 ~ 909.30 | 160.70 ~ 920.70 | 0.224 | 5.878 ~ 35.799 | 6.327 ~ 36.248 |
V225, V275, V315, V325, V380, V430, V475 | 6.00 | 222.50 ~ 470.50 | 234.50 ~ 482.50 | 0.236 | 8.760 ~ 18.524 | 9.232 ~ 19.000 |
P150~505, P545, P590~600, P610, P620~625, P635, P650, P680, P690, P700, P710, P720, P730, P740, P750, P760, P770, P780, P790, P800, P810, P820, P830, P840, P850, P860, P870, P880, P890, P900, P910~920, P930, P940, P950, P960, P970, P980, P990, P1000 | 8.40 | 149.50 ~ 999.50 | 166.30 ~ 1016.30 | 0.331 | 5.886 ~ 39.350 | 6.547 ~ 40.012 |
V480, V490, V510, V530, V585, V640, V690, V740, V790, V845, V950, V1055 | 10.00 | 475.00 ~ 1044.00 | 495.00 ~ 1064.00 | 0.394 | 18.701 ~ 41.102 | 19.488 ~ 41.890 |
What is JIS B2401 Standard?
JIS B2401 is a Japanese industrial standard for O-ring sizes, set by the Japanese Standards Association. This standard groups O-rings into two main series: the P series, which is designed for moving parts such as pistons and rods, and the G series, which is designed for fixed sealing on flat or cylindrical surfaces.
The standard clearly defines the inner diameter, outer diameter, wire diameter, and groove dimensions for each size. JIS B2401 O-rings are widely used throughout Japan and across Asia in machinery, automotive, hydraulic, and general industrial equipment.
ZSR Silicone manufactures silicone O-rings that fully match JIS B2401 standard sizes, covering both the P series and G series. If your equipment follows Japanese design specifications or you need to replace seals in machines built for the Asian market, we can supply the correct JIS B2401 size in the silicone material that fits your application.
