Description
M103 Tank Rear Round Ammunition Box Support Bolt
The M103 Tank Ammunition Bolt, identified by P/N 7407641, is an externally relieved mounting bolt used at the intermediate and rear supports of a 7.62mm ready-round ammunition box. The reference package carries FSN 5306-740-7641, now written as NSN 5306-00-740-7641.
The package's G-256 assignment associates this bolt with the T43E1, M103, and M103A1 120mm gun tank family. The bolt supported a machine-gun ammunition box inside the vehicle; it was not part of the tank's 120mm ammunition.
Historical Significance
The T43E1 and standardized M103 belonged to the U.S. Army's postwar heavy-tank program. The M103 family combined a 120mm main gun with smaller-caliber machine guns and the internal stowage needed to keep their ammunition available to the crew.
The M103 Tank Ammunition Bolt represents a small but specifically documented part of that interior equipment. Its G-256 package assignment connects it to the Army supply catalog for the T43E1 and M103 tank family.
M103 Package Assignment and M48A5 Cross-Application
The G-256 marking identifies the reference package's assignment to the T43E1/M103 tank family. That assignment does not mean the bolt was exclusive to the M103.
An Army M48A5 repair-parts manual, TM 9-2350-258-20P-2, also lists P/N 7407641 and NSN 5306-00-740-7641 in Figure 81 as the bolt for the intermediate and rear supports of a 7.62mm ready-round ammunition box. This documents the same hardware in more than one U.S. armored-vehicle application.
What This Item Is and Does
The M103 Tank Ammunition Bolt secured the intermediate and rear support points used to mount a 7.62mm ready-round ammunition box inside the tank. Its official logistics nomenclature is Bolt, Externally Relieved Body.
This is mounting hardware for the ammunition-box support structure. It is not ammunition and is not part of the M103's 120mm gun mechanism.
Key Features
- Product: M103 Tank Ammunition Bolt
- Part number: 7407641
- Package stock number: FSN 5306-740-7641
- Modern stock number: NSN 5306-00-740-7641
- Federal item name: Bolt, Externally Relieved Body
- Package assignment: G-256
- Associated tanks: T43E1, M103, and M103A1
- Documented shared application: M48A5 tank
- Mounting role: Intermediate and rear supports for a 7.62mm ready-round ammunition box
- Sale quantity: 1 bolt
Why This Item Matters
The M103 Tank Ammunition Bolt is a documented piece of specialized interior mounting hardware from U.S. Army armored vehicles. It helps illustrate how ready ammunition was supported and secured within the crew compartment.
Its known part number, stock numbers, G-256 package assignment, and M48A5 cross-application make it useful for component identification, museum interpretation, restoration reference, and technical study.
About This Item
The package identifies P/N 7407641, FSN 5306-740-7641, G-256, contract DA-20-113-ORD-27764, and a package quantity of 2 bolts.
The customer will receive one bolt only. The original two-pack and its packaging are shown for identification and reference only; two bolts are not included with this purchase.
All items are opened from the original packaging to verify its condition before shipment. If your prefer to receive an item in its original, unopened packaging, please indicate your request in the order comments at checkout.
Please Note: If you request an item in its original, unopened packaging, we are unable to verify the item's condition prior to shipment.
Ideal For
This item is a strong fit for:
- M103 and M103A1 tank collections
- T43E1 heavy-tank displays
- M48A5 vehicle reference collections
- Military museum and educational exhibits
- Historic armored-vehicle restoration reference
Approx length 3", Approx width 1.25", Approx height 1.25", Approx weight .5lbs.
Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item's general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.
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