No. 6 Mk 1, Type 1 No. 6 Mk 1, and Type 4 No. 6 Mk 1 BombsType 99 No. 6 Mk 2 Bomb Modification 1
Japanese Explosive Ordnance – Bombs, Bomb Fuzes, Land Mines, Grenades, Firing Devices
and Sabotage Devices
Chapter 1 – Section 2
Japanese Navy Bombs
Type 99 No. 6 Mk 2 Bomb

Fuzes: A-3 (a).

Over-all length: 42 inches.

Length of body: 21 inches.

Diameter of body: 9 3/8 inches.

Thickness of wall: 3/16 inches.

Material of wall: Steel.

Type of suspension: Horizontal.

Suspension lug: Two lugs. Normal Navy type.

Color and markings: Gray over all with a green tipped nose and a blue band aft of the green.

Length of tail: 21 inches.

Width of tail: 13 1/4 inches.

Width of tail fins: 6 inches.

Dimension of tail struts: Outer struts: Length, 9 1/2 inches; width, 1 3/4 inches, tick-ness, 1/16 inch. Inner struts: Length, 4 3/4 inches, width 1 3/8 inches, thickness, 1/16 inch.

Material of tail: Steel.

Type of filling: Type 98 explosive.

Weight of filling: 85 pounds.

Total weight of bomb: 140 pounds.

Charge/weight ratio: 60 percent.

Construction of body: A cast-steel nose is attached to a tubular-steel body by a con-tinuous circumferential weld and 2 rows of 16 plug welds. A tail cone is attached to a collar by a continuous circumferential weld and 16 plug welds. The collar fits into the after end of the body and is held there by 2 rows of screws (16 per row).

Construction of tail: Four tail fins are welded to the tail cone and are braced by four sets of box-type struts.

Remarks: This bomb may be found with only one set of struts.

Figure 47 - Type 99 No. 6 Mk 2 Bomb.

No. 6 Mk 1, Type 1 No. 6 Mk 1, and Type 4 No. 6 Mk 1 BombsType 99 No. 6 Mk 2 Bomb Modification 1