USNBD, Bombs and Fuzes; Section I - High Explosvie Bombs; Part III - U.S. Army-Navy "AN" Series Bombs: 500 lb. AN-M43, AN-M64

U.S.N.B.D. - UNITED STATES - BOMBS AND FUZES; PYROTECHNICS

SECTION I - HIGH EXPLOSIVE BOMBS

PART IV - U.S. ARMY-NAVY "AN" SERIES BOMBS

DATA:		ARMY - NAVY BOMBS
		500 LB. G.P.
OVERALL LENGTH	56.8 in.
BODY LENGTH	45.0 in.
BODY DIAMETER	14.2 in.
WALL THICKNESS	0.3 in.	AN-M43 (Obsolesecent)
TAIL LENGTH	13.9 in.	AN-M64 (Service)
TAIL WIDTH	18.9 in.	AN-M64A1 (Service)
TAIL WEIGHT	12.3 lb.

WEIGHTS:

	AN-M43		AN-M64		AN-M64A1
Type of Filling	Amatol	T.N.T.	Amatol	T.N.T	T.N.T	Comp B
Weight of Filling	262#	267#	262#	267#	267#	274#
Total Weight	510#	525#	510#	525#	525#	535#
Chg/Wt. Ratio	51.2%	51.0%	51.2%	51.0%	51.0%	51.0%

FUZING:

The fuzing of these three bombs is the same with these exceptions: The AN-Mk 230 (and Mods) and Mk 231-0 fuzes can be used in the AN-M64 because this bomb has the M115 (or M115A1 - see Introduction) adapter booster. The M115 adapter booster has a sleeve than can be easily removed making it possible to use a fuze with a larger diameter. With the removable sleeve screwed in the adapter booster, any Army tail fuze may be used. The AN-M43 uses the M102 adapter booster which has no removable sleeve and therefore cannot take the AN-Mk 230 and Mk 231 hydrostatic fuzes.

Regular Missions

Nose:	AN-M103, M103, AN-M103A1, M135, M135A1, M136, M136A1, M139, AN-M139A1, M140, AN-M140A1, M149, M163, M165, Mk243, Mk244, Mk239, AN-Mk219
Tail:	AN-M101A2, AN-M101A1, M101, M161

Special Missions

Tail:	M113, M113A1, (Masthead bombing from land base only) M116 (Masthead from carrier or land base) M124, M124A1, Mk 237-0 (Long Delay Time Fuze against land targets) M151 (Anti-ricochet)
Nose:	Shipping plug, when above tail fuzes used.

Anti-Submarine Mission (AN-M64, AN-M64A1)

Nose:	AN-M103A1, AN-M103, M103, M139, AN-M139A1, M140, AN-M140A1, M163, M164, M165, Mk 239, Mk 243, Mk 244-0-1
Tail:	AN-Mk 230-4-5-6, Mk 230-0 (sleeve in M115 adapter booster must be removed before this fuze can be used)

VT Missions

Nose:	T50E4, T90, T92, M166 (T51E1), T82
Tail:	AN-M102A2 (Insure detonation in event of VT fuze failure).

REMARKS:

The AN-M43, AN-M64, and AN-M64A1 are identical types except for the adapter booster which is employed in the base plate to receive the tail fuze. The AN-M43 used the M102 adapter booster, the AN-M64 uses the M115 adapter booster and the AN-M64A1 uses the M115A1 adapter booster. The A1 modification also includes two base plate locking pins fitting into the main filling, preventing removal of the base plate, and a groove in the internal thread of the base plate which mates the hole of the M115A1 adapter booster to receive a locking pin, supplied only with anti-withdrawal fuzes. With this pin held in place by the fuze body, the adapter booster cannot be extracted.

When anti-ricochet action is desired, the M17 anti-ricochet device is fitted, consisting of the M6 parachute, M200 fuze adapter, and M151 tail fuze.

For Construction of Body, Suspension, Color & Markings, Type of Filling, and Tail Construction, see Introduction, page 37.