SB 742-1
PROJECTILE, 155MM, ICM FAMILY
Model
Old Style Base
New Style Base
M483A1
1320-00-126-
1320-01-260-
a. FSC: 1320.
7339-D563
8720-D563
b. Ammunition type: Projectile, 155mm HE, Improved
M692
1320-00-434-
1320-01-261-
Conventional Munitions (ICM).
Includes model numbers
8856-D501
6043-D501
M483A1, M692, M718, M718A1, M731, M741, and M741A1.
M731
1320-00-434-
1320-01-260-
8861-D502
8719-D502
c. The M483A1 family of projectiles has metal parts
M718
1320-01-050-
1320-01-268-
comprised of four main components (less cargo).
The
6059-D503
0387-D503
components and basic material compositions are as follows:
M718A1
1320-01-151-
1320-01-269-
(1) Ogive: aluminum (alodined).
9849-D515
2257-D515
M741
1320-01-050-
1320-01-268-
(2) Body: steel/fiberglass.
7966-D509
0386-D509
M741A1
1320-01-150-
1320-01-268-
(3) Base: aluminum (anodized).
7857-D514
0385-D514
(4) Fusible lifting plug: steel.
d. The design and material composition of the M483A1
family represents a departure from previous generations of
Exercise extreme care when handling a projectile with an
artillery ammunition. These design and/or material changes
exposed or damaged cargo of submissiles (grenades or mines)
warrant special emphasis during the life cycle surveillance of
or a loose base. Submissiles can fall out, arm, and explode
these munitions. Areas of emphasis are specified in para N-5
with lethality of a fragmentation hand grenade.
of this appendix. For a complete, detailed description of the
M483A1 family, see TMs and Dwgs.
e. Projectile models M483A1, M692 and M731 are thin
based projectiles. The aluminum bases on these models,
manufactured prior to April 1988, are susceptible to stress
gaging requirements. Ring and gap gaging will be conducted
corrosion cracking, evidenced by surface corrosion. Projectiles
during IRI according to chapter 2 and appropriate drawings
with base corrosion or stress corrosion cracks may
and specifications. Subsequent gaging will only be performed
malfunction inbore. New production bases are of an improved
on those projectiles showing evidence of damage.
aluminum alloy which is less susceptible to stress corrosion
cracking. New style bases are identified by black color and by
the projectile's NSN. The improved alloy will be used in new
a. Inspection Category Y, Periodic Inspection interval -
production and replacement bases for all ICM projectiles, both
three years.
thin based and remote anti-armor mine system (RAAMS).
Appropriate stock numbers are provided in table N-1.
b. Sampling plan for inspection is according to chapter 2.
Item will be inspected and classified according to chapter 2
and table N-3.
Description
Model
Application
Requirements
Gage, Ring
All
Upper and lower bourrelet
All
Bourrelet gage failure area
Gage, Feeler, Blade Type
All
Base and body interface
Gage, Depth
All
Fiberglass wrap and
rotating band
* Use gage, ring, P/N 7304558, NSN 5220-00-395-4487
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