S.A.P. 500-pound AN-M58 (Obsolescent), AN-M58A1, and AN-M58A2;
1,000-pound AN-M59 and AN-M59A1

Over-all length, inches

Body length, inches

Body diameter, inches

Wall thickness, inch

Tail length, inches

Tail width, inches

Tail weight, pounds

Filling

Weight of filling

Total weight

Charge/weight ratio

Fuzing: For ordinary use, only tail fuzes are employed in S.A.P. bombs, but Nose Fuze AN-M103 and variations of this fuze can be employed for fragmentation effect, in which case a non-delay primer detonator is employed in the tail fuze. Otherwise, in regular mis-sions a short-delay primer detonator is used in the tail fuze, with a shipping plug in the nose.

Regular missions (Tail fuzed only)

500-lb.: AN-M101A2, AN-M101A1, M161.

1,000-lb.: AN-M102A2, AN-M102A1, M162.

Special missions (Fragmentatin effect)

Nose: AN-M103, AN-M103A1, M135, M135A1, M136, M136A1, M139, AN-M139A1, M140, AN-M140A1, M149, M163, M164, M165, Mk 239.

Tail:

500-lb.: AN-M101A2, AN-M101A1, M161.

1,000-lb.: AN-M102A2, AN-M102A1, M162.

Other missions (Tail fuzed only)

500-lb.: M113A1, M113, M116 (minimum altitude).

M124, M124A1, M133 (long-delay).

1,000-lb.: M114, M114A1, M117 (minimum altitude).

M125, M125A1, M134 (long delay).

V.T. missions

Nose: M166 (T51E1), T82.

Tail: (Insurance)

500-lb.: AN-M101A2.

1,000-lb.: AN-M102A2.

Construction: S.A.P. bombs are of single-piece construction, either cast or spun, slightly streamlined in shape, with semi-pointed noses. The threaded nose opening recei-ves a fuze-seat liner and a steel nose plug, which can be removed, allowing an instanta-neous nose fuze to be inserted when fragmentation effect is desired. Suspension lugs are welded to the case in a manner similar to G.P. bombs; for dive bombing, trunnions on a band may be installed. The box-type tail is characteristic of that used on G.P. bombs.

Filling: Cast TNT is being used currently, with a wax pad employed in the nose to cushion the explosive against premature detonation on impact with an armored target. One Auxiliary Booster M104 is used, positioned just before the Adapter Booster M102. In the future, Army S.A.P. bombs will have, as their main charge, Picratol, the filling now standard for the 2,000-pound S.A.P. Bomb M103.

Markings: Bombs having wax in the nose can be indentified by the marking "with pad".

Remarks: In the AN-M58A1, 9.5 pounds of Amatol are removed and replaced by 31.5 pounds of steel to increase the penetration of the bomb. To enable these S.A.P. bombs to be used with anti-withdrawal fuzes, the AN-M58A2 and the AN-M59A1 incorporate base-plate locking pins and the Adapter Booster M102A1, thus preventing removal of the base plate and adapter booster. Present production eliminates Auxiliary Booster M104.

Figure 287. 1,000-pound S.A.P. Bomb AN-M59