This document provides a roadmap for the Open Science Hardware (OScH) community to achieve their goal of making open science hardware ubiquitous by 2025. It outlines three key areas of focus: Learn, Support, and Grow. In the Learn section, it recommends establishing a collaborative research agenda on OScH and developing frameworks for evaluating OScH projects. The Support section discusses providing institutional support for OScH projects and communities. The Grow section focuses on increasing participation in and advocacy for the OScH community. The overall roadmap was developed through contributions from over 100 people in the global OScH community.