Technical Manual (TM 3-4240-264-12) for M51 Inflatable Shelter System
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Technical Manual (TM 3-4240-264-12) M51 Inflatable Shelter
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This Technical Manual TM 3-4240-264-12 covers the M51 Trailer-Transported Inflatable Chemical-Biological Collective Protection Shelter System and is dated August 1975. This copy is an original manual reprint with Changes 1 and 2 included, making it especially useful for collectors, researchers, restorers, and anyone building a serious reference library around U.S. Army protective equipment and Cold War technical publications.
Because this is a -12 technical manual, it belongs to the operator and organizational maintenance side of Army documentation. In practical terms, manuals in this category were intended to support day-to-day operation, inspection, servicing, and unit-level maintenance of the equipment covered. That gives this publication more value than a simple identification reference and makes it especially useful for collectors who want a service-style manual with practical technical content.
The M51 Trailer-Transported Inflatable CB Collective Protection Shelter System
The M51 belongs to the broader family of U.S. military collective protection and chemical-biological support equipment. As identified by its nomenclature, it was a trailer-transported inflatable shelter system designed for CB collective protection, placing it squarely in the support side of Army protective operations rather than in the category of conventional weapons or vehicles.
A shelter system of this type was intended to provide a protected enclosed space for personnel in environments where chemical or biological contamination was a concern. The fact that it was inflatable and trailer transported makes it especially interesting from a historical standpoint, because it reflects the Army’s effort to create mobile, deployable protected environments rather than relying only on fixed shelters or permanent installations.
For collectors, that makes this manual especially appealing. It documents the technical side of Cold War protective systems rather than more commonly seen combat equipment, and it ties directly to one of the more unusual categories of Army field support gear.
What This Manual Covers
As an operator’s and organizational maintenance technical manual, TM 3-4240-264-12 would have been intended to support the practical service use of the M51 shelter system at the user and unit-maintenance level.
In practical terms, a manual like this is especially relevant for:
- nomenclature and identification
- operating procedures
- setup and service-use reference
- inspection and servicing guidance
- organizational maintenance information
- archival and restoration research
Because this copy is an original reprint with Changes 1 and 2 included, it offers an added level of usefulness for anyone who wants a more complete service-era reference rather than an earlier uncorrected issue by itself.
Historical Significance
The date August 1975 places this publication in the later Cold War period, when the U.S. military maintained extensive technical literature covering collective protection, chemical-biological defense, filtration, decontamination, and protected-environment support systems. Manuals like this reflect a period when Army documentation extended far beyond weapons and vehicles to include the equipment required to help units remain operational in hazardous conditions.
For collectors and historians, this manual is especially relevant to subjects such as:
- Cold War U.S. Army technical manuals
- collective protection shelter systems
- chemical-biological protective equipment
- inflatable military shelter systems
- dated military technical publications
Because it covers a specialized trailer-transported inflatable shelter rather than a more common vehicle or weapon system, it also adds variety to collections that already include standard ordnance or maintenance manuals.
About This Manual
This listing is for Technical Manual TM 3-4240-264-12 for the M51 Trailer-Transported Inflatable CB Collective Protection Shelter System, dated August 1975.
This copy is an original manual reprint with Changes 1 and 2 included.
It is especially well suited for:
- U.S. Army technical manual collections
- Chemical Corps and protective-equipment displays
- Cold War military paper collections
- museum exhibits on military field support systems
- archive and research libraries focused on U.S. military technical publications
Because manuals were working documents, surviving examples are valued not only for their content, but also for their connection to real military training, maintenance, and support practice.
Why This Manual Matters
Many military manuals focus on weapons, vehicles, or combat systems. This one documents the support side of military readiness, specifically a mobile collective-protection shelter system intended for hazardous environments. That makes it especially useful for collectors who want to preserve the broader technical and logistical picture of Army Cold War preparedness rather than only front-line hardware.
For collectors, it is a solid stand-alone Cold War technical manual with a specialized subject focus. For researchers, it offers a useful reference point for Army collective-protection shelter documentation. For museums, it helps explain the behind-the-scenes systems that supported operations in contaminated or threatened environments.
Ideal For
This manual is a strong fit for:
- U.S. Army technical manual collections
- Cold War Chemical Corps displays
- collective protection and shelter-system collections
- museum and archival reference libraries
- collectors of military paperwork and dated technical publications
Approx length 11", Approx width 8.5", Approx height .75", Approx weight 1.5lbs.
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