This original U.S. military surplus 155mm M109 Howitzer Adjusting Knob is offered in new old stock condition and is a rare and collectible component from the Cold War era M109 self-propelled howitzer platform. Marked with Federal Stock Number (FSN) 1025-801-6814 and Part Number 10913536, this knob is believed to be used within the M109’s interior crew compartment based on its white paint finish—standard for components located inside crewed vehicle spaces where visibility and contrast are important.

While the precise function of this adjusting knob is not definitively documented, components of this type were commonly associated with fire control, seating, or environmental regulation systems within armored vehicles. Given its origin, it may have been part of an instrumentation panel, an internal aiming system, or a mechanical interface for adjusting mounted equipment.

The M109 155mm self-propelled howitzer entered service in the early 1960s and quickly became one of the most widely used artillery systems in NATO arsenals. It featured a fully enclosed, crew-protected compartment and provided rapid-deployment firepower in both conventional and modern warfare theaters. Over its decades of service, the M109 saw action in Vietnam, the Cold War, Operation Desert Storm, and beyond, with multiple upgrades still in service today.

Product Specifications:

Condition: New Old Stock (NOS)
Part Number: 10913536
FSN: 1025-801-6814
Intended Use: Likely interior crew compartment or fire control interface
Platform Compatibility: 155mm M109 Self-Propelled Howitzer

Ideal For:

Restoration of M109 howitzers or related armored vehicles
Cold War and modern artillery collectors
Military vehicle museums and static display builders
Educational institutions or ordnance historians

Approx length 3", Approx width 3", Approx height 1", Approx weight 1.3lbs.

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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