The Nose Mechanical Impact Fuze M148 is the same as the AN-M103, except that the booster cup has been modified so as to have the contour of the standard Japanese Navy type gaine. In addition, the threads on the fuze body have been modified to fit Japanese navy bombs - 1.84-inch, 10 Whitworth thread.
No information about functioning.
No information about hazardous components.
MIL-HDBK-146, Fuze Catalog (1982)
TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)
OP 1664, Volume 2 - US Explosive Ordnance (1947)
USNBD - Bombs and Fuzes, Pyrotechnics (1945)