This document establishes the preferred range of nominal dimensions and associated tolerances for a series of hydraulic cylinder rod and piston seal housings for reciprocating applications in the following range of dimensions:

An additional range of seal housings is detailed in this document to meet the reduced envelope requirements of the 160 bar (16 MPa)¹ compact series of ISO 6020‑2; these smaller section seals require stricter piston rod and cylinder bore tolerances. The range of dimensions is as follows:

This document does not give details of seal design, since the manner of construction of seals varies with each manufacturer. The design and material of the seal and any incorporated anti-extrusion components are determined by conditions such as temperature and pressure.

This document only applies to the dimensional criteria of products manufactured in conformity with this document; it does not apply to their functional characteristics.