Description
M102 105mm Howitzer Breechblock Operating-Crank Pivot Pin
The M102 105mm Howitzer Breechblock Operating-Crank Pivot Pin, P/N 8769511, is a U.S. Army shoulder pin used in the breech mechanism of the M102 light towed howitzer. The package identifies the drawing as A8769511, Revision D.
This pin provides the pivot connection associated with the breechblock operating crank. It is a mechanical spare part rather than ammunition, an explosive component, or the complete breech mechanism.
Historical Significance
The M102 was developed as a lightweight, air-mobile 105mm howitzer for U.S. Army field artillery. Its M31 carriage and firing platform gave the weapon greater mobility and allowed wide traverse after emplacement.
Army records place this pin within breech mechanism assembly 8769507. The assembly converted movement of the operating handle and crank into controlled movement of the breechblock during operation of the howitzer's breech mechanism.
M102 Breech Mechanism Application
TM 9-1015-234-20P identifies P/N 8769511 in Figure 2, Item 25, under breech mechanism assembly 8769507 for the M102 105mm light towed howitzer. The parts listing assigns one pin to that assembly.
Within this mechanism, the shoulder pin engages the breechblock slot and provides the pivot point used by the operating-crank linkage. This relationship allows movement of the operating crank and handle to raise or lower the breechblock.
What This Item Is and Does
The M102 105mm Howitzer Breechblock Operating-Crank Pivot Pin is a headless shoulder pin with NSN 5315-00-073-0255. Its stepped form locates and retains the operating-crank connection while permitting the required pivoting movement inside the breech mechanism.
The pin is one component of the mechanism. It does not function as the breechblock, operating crank, handle, firing mechanism, or complete howitzer assembly.
Key Features
- Official nomenclature: Pin, Shoulder, Headless
- National Stock Number: 5315-00-073-0255
- Part number: 8769511
- Package drawing marking: A8769511, Revision D
- Application: M102 105mm light towed howitzer
- Parent assembly: breech mechanism assembly 8769507
- Assembly quantity: one pin
- Package marking: 5/76
- Packaged supplier: RKM Industries, CAGE 7L079
- Contract marking: DAAA22-76-C-6211
Why This Item Matters
This correctly identified pivot pin is useful for the restoration, preservation, or technical study of an M102 breech mechanism. The matching NSN, drawing number, revision, and manual location provide a clear reference for the part's original system relationship.
It also represents the many purpose-designed mechanical components required to translate hand-operated controls into precise breechblock movement on a lightweight artillery system.
About This Item
The offered item is one M102 breechblock operating-crank pivot pin. The package is marked 5/76 and identifies RKM Industries, CAGE 7L079, under contract DAAA22-76-C-6211.
The M102 breech mechanism, breechblock, operating crank, handle, and other related components are separate equipment.
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:
- M102 105mm howitzer restoration projects
- Artillery museums and historical displays
- U.S. Army field-artillery collections
- Breech-mechanism component reference
- Military technical study and parts identification
Approx length .5", Approx width .5", Approx height 1", Approx weight .1lbs.
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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