Type 90 5.7 cm (57-mm) High Explosive ProjectileType 92 5.7-cm Armor-Piercing Projectile
Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition
Chapter 4 – Section 1
ARMY PROJECTILES
Type 90 - 5.7 cm (57-mm) Substitute Projectile
Weight of complete round: 3.04 kg. (6.70 pounds).
Weight of projectile, filled: 2.23 kg. (4.91 pounds).
Weight of filling: 0.07 kg.
Filling: Black powder.
Diameter at bourrelet: 57 mm (2 1/4 inches).
Length of projectile (without fuze): 183 mm (7 13/64 inches).
Length of propellant case: 121 mm ( 4 3/4 inches).
Length of assembled round (without fuze): 272 mm (10 11/16 inches).
Width of rotating band: 9.5 mm.
Weapons in which used: Type 90 tank, gun, type 97 tank gun.
Fuzing: Type 88 short-delay fuze.
Propellant: Mk 1 sq. grain (med.) 113 grams.
Remarks: This projectile is made of cast iron and has very thick walls.

Figure 233 – Type 90 5.7-cm Substitute Projectile.

Type 90 5.7 cm (57-mm) High Explosive ProjectileType 92 5.7-cm Armor-Piercing Projectile