Seal: O-ring
ISO 3601-1
ISO 3601-1 - Fluid power systems - O-rings - Part 1: Inside diameters, cross-sections, tolerances and designation codes
Automatically build standard products in SOLIDWORKS with TSFP.
O-rings of circular cross-section for seals in fluid power systems. ISO 3601-1:2012 specifies the inside diameter d1, the cross-section diameter d2, their tolerances and the size codes: codes 001–475 are the general industrial sizes (Tables 1–6, tolerance class A or B), codes A0018–E4000 the aerospace sizes (Tables 7–11).
| Product | Inner diameter, mm | Cross-section diameter, mm | Centerline diameter, mm | Outer diameter, mm | Nominal size code |
|---|---|---|---|---|---|
| ISO 3601-1 O-ring E3150 315x7 | 315 | 7 | 322* | 329* | E3150 |
| ISO 3601-1 O-ring E3250 325x7 | 325 | 7 | 332* | 339* | E3250 |
| ISO 3601-1 O-ring E3350 335x7 | 335 | 7 | 342* | 349* | E3350 |
| ISO 3601-1 O-ring E3450 345x7 | 345 | 7 | 352* | 359* | E3450 |
| ISO 3601-1 O-ring E3550 355x7 | 355 | 7 | 362* | 369* | E3550 |
| ISO 3601-1 O-ring E3650 365x7 | 365 | 7 | 372* | 379* | E3650 |
| ISO 3601-1 O-ring E3750 375x7 | 375 | 7 | 382* | 389* | E3750 |
| ISO 3601-1 O-ring E3870 387x7 | 387 | 7 | 394* | 401* | E3870 |
| ISO 3601-1 O-ring E4000 400x7 | 400 | 7 | 407* | 414* | E4000 |
* Calculated value: worked out from the dimensions the standard specifies, not listed in the standard itself.