Abstract: A safety fuze for a hand grenade comprises a fuze body, a delay case assembly, an initiator lever assembly, and a cover assembly. The fuze body has a head, a stem, and a central portion, and a bore extending longitudinally therethrough. The delay case assembly is matingly received in the bore and includes an upper primer portion containing a primer in a primer holder, and a lower delay portion. A flat, circular seal is interposed between the base of the primer and the primer holder. A first annular seal is matingly received in a first annular channel defined between the primer holder and the delay case. A second annular seal is matingly received in a second annular channel defined between the delay case assembly and the bore. An annular gasket is matingly received in a third annular channel formed in the bottom wall of the central portion of the fuze body.

Abstract: A safety fuze for a hand grenade comprises a fuze body, a delay case assembly, a detonator assembly, an initiator lever assembly, a cover assembly, and a pull ring assembly. The fuze body has a head, a stem, and a central portion, and a bore extending longitudinally therethrough. The delay case assembly comprises a delay case matingly received in the bore and having an upper primer portion containing a primer, a lower delay portion containing ignition, delay and penetration charges, a sealant separating the primer portion from the delay portion, and an air gap separating the primer portion from the ignition charge. The detonator assembly comprises a detonator case matingly receiving the fuze body stem at the top thereof and being in sealing engagement with the fuze body, and has an explosive detonator charge at the bottom thereof. A gap is provided between the fuze body bottom and the explosive charge.