Energy absorbing flange for meltable fuze plug

In an unfuzed munition having a hollow stem (413) and a front ogive portion (405) having internal threads (412), a meltable, vented, shock absorbing fuze plug assembly (300) which protects the ogive and munition from physical damage and also vents out burning energetic material from the munition for IM sensitivity effects, said fuze plug assembly comprising a meltable plastic fuze plug (301) having a handle (414) with a lunette (415) thereon, and also having a cylindrical lower area with external threads thereon (311) sized to said stem (418) and said internal threads (412), and also includes an upper flange (302), with an over sized metal washer mounted immediately below said upper flange, arranged to absorb impacts against said munition and ogive, said metal washer oversized in diameter compared to the diameter of said upper flange (302);

• wherein said metal washer is sheet steel of a defined thickness for significant shock attenuation and comprises corrugations following cross-sectionally sinusoidal shaped wave patterns, where the waves are largest in amplitude (501) nearest to the munition ogive body, then decline to lower amplitudes (502) farther from the munition ogive body, the corrugation of the metal washer having cross-sectionally sinusoidal shaped wave patterns then finally ending in a plain edge (503) farthest from the munition ogive body.