INCH-POUND MS17825H 5 February 2004 SUPERSEDING MS17825G 30 November 1988 MS SPECIFICATION SHEET NUT, SELF-LOCKING, CASTELLATED, HEXAGON, .250°F NON-METTALIC INSERT Reactivate after 5 February 2004 and may be used for new and existing designs and acquisitions. This specification is approved for use by all Department and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this MS specification sheet and NASM25027. OPPOSITE SLOTS.