Guide
What are concurrent spare parts in Foreign Military Sales?
, also called initial spare parts, are the initial stock of spares sold with a or system. The includes at least a one-year supply, identified by category and total value rather than item by item, and the spares are normally shipped before the is released.
Concurrent spare parts
ensures international partners are afforded the opportunity to acquire the full complement of articles and services necessary to field, maintain, and utilize major items of equipment efficiently and effectively. To a large degree, depends on receiving a comprehensive . In addition to the itself, a case that follows the concept will address areas such as training, technical assistance, publications, initial support, and follow-on support.
As part of the , should ensure that cases for equipment include at least a one-year supply of spare parts. See C5.6.5.4.10.2 for more information. These packages are referred to as or initial spare parts (ISP). Cases should include CSP or ISP for all support and ancillary equipment listed on the as well as for major weapon systems. normally require that a significant portion of CSP and ISP be in country before they will release for delivery. CSP and ISP are often identified by category and total value rather than itemized on the .
References
SAMM
- SAMM GLOSSARY/concurrent-spare-parts-csp — Concurrent Spare Parts (CSP)
- SAMM GLOSSARY/initial-spares — Initial Spares
- SAMM C5.6.5.4.10.2
- SAMM C9.9.1.5.2.3 — Concurrent Spare Parts.
Related
Concurrent Spare Parts (CSP)
These are spare parts programmed as an initial stockage related to the acquisition of a major item or system. CSPs are normally shipped in advance of the release of the major item or system.
SAMM Glossary, as of 12 September 2026
Glossary entry →Open the manual’s entry → (opens in new tab)
Major Item
Defense articles identified in the Military Articles and Services List (MASL) with a unit of issue other than "XX" (dollar lines)." Control over the programming of these items is required.
SAMM Glossary, as of 12 September 2026
Glossary entry →Open the manual’s entry → (opens in new tab)
Letter of Offer and Acceptance (LOA)
The legal instrument used by the USG to transfer itemized defense articles, defense services, and design and construction services to foreign partners.
When used under the authorities provided in the Arms Export Control Act for Foreign Military Sales, the LOA is a binding agreement signed by the USG and the foreign partner to transfer such articles and services.
When used under Building Partnership Capacity (BPC) authorities, the BPC LOA is not signed by the Benefitting Partner.
SAMM Glossary, as of 12 September 2026
Glossary entry →Open the manual’s entry → (opens in new tab)
TPA — Total Package Approach
SAMM Acronyms, as of 12 September 2026
LOR — Letter of Request
SAMM Acronyms, as of 12 September 2026
Weapon System
A combination of one or more weapons with all related equipment, materials, services, personnel, and means of delivery and deployment (if applicable) required for self-sufficiency.
SAMM Glossary, as of 12 September 2026
Glossary entry →Open the manual’s entry → (opens in new tab)
Implementing Agency (IA)
The military department or defense agency responsible for the execution of military assistance programs. With respect to FMS, the military department or defense agency assigned responsibility by the Defense Security Cooperation Agency to prepare an LOA and to implement an FMS case. The implementing agency is responsible for the overall management of the actions that will result in delivery of the materials or services set forth in the LOA that was accepted by a foreign country or international organization.
SAMM Glossary, as of 12 September 2026
Glossary entry →Open the manual’s entry → (opens in new tab)
SAMM — Security Assistance Management Manual
SAMM Acronyms, as of 12 September 2026
Glossary entry →Security Assistance Management Manual (SAMM) →
LOA — Letter of Offer and Acceptance
SAMM Acronyms, as of 12 September 2026
Major End Items
Any end item that is Significant Military Equipment or Major Defense Equipment or where control over the programming of these items is required. See also "end item."
SAMM Glossary, as of 12 September 2026
Glossary entry →Open the manual’s entry → (opens in new tab)
Payment Schedule
List of dollar amounts and when they are due from the foreign customer. The payment schedule is included in the Letter of Offer and Acceptance (LOA) presented to the customer. After acceptance of the LOA, the payment schedule generally serves as the basis for billing to the customer. Changes in the estimated costs of an Foreign Military Sales case may require changes in the accompanying payment schedule.
SAMM Glossary, as of 12 September 2026
Glossary entry →Open the manual’s entry → (opens in new tab)