The Clamp Assembly,ball, cataloged under National Stock Number 1220-01-485-6556, is classified within Federal Supply Class 1220 (Fire Control Computing Sights and Devices) of the Fire Control Equipment group. The manufacturer of record is National Products, Inc. Dba N P I. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1220-01-485-6556 |
| Primary Part Number | RAM-D-101U |
| Item Name | Clamp Assembly,ball |
| FSC / FSG | 1220 / 12 — Fire Control Computing Sights and Devices |
| Manufacturer | National Products, Inc. Dba N P I |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| RAM-D-101U PRIMARY | National Products, Inc. Dba N P I (USA) |
| Reference | Meaning |
|---|---|
| 12992837 | 7/2 Vendor item drawing reference Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
NSN 1220-01-485-6556 is a Clamp Assembly,ball, manufactured by National Products, Inc. Dba N P I, classified under FSC 1220, Fire Control Computing Sights and Devices. Status: active.
NSN 1220-01-485-6556 has 1 manufacturer part number on file: RAM-D-101U (National Products, Inc. Dba N P I).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-565-2178. Verify interchangeability with system specifications before substitution.
Key specifications for RAM-D-101U: End Item Identification: XM31 MORTOR BALLISTIC COMPUTER, M577 AND M1064; ARMORED MULTI-PURPOSE VEHICLE (AMPV). 0 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1220-01-485-6556 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.