This specification covers modular gage boards for mounting 89-mm (3 1/2-in.), 114-mm (41/2-in.), 152-mm (6-in.), and 216-mm (8 1/2-in.) dial size pressure gages and dial thermometers for miscellaneous shipboard applications. Gage boards ordered under this specification are suitable for pressure gages and dial thermometers with either turret or back flanged type cases and with either back or bottom connections (see Appendix X1). Gage mounting dimensions shall be in accordance with ANSI B40.1. The values stated in metric units (SI) are to be regarded as the standard. The values given in parentheses (inch/pound) are provided for information purposes. Note -Gage boards covered by this specification are those normally supplied by the shipyard as opposed to the shipyard's equipment subcontractor.