The Counterweight, cataloged under National Stock Number 1075-01-231-4621, is classified within Federal Supply Class 1075 (Degaussing and Mine Sweeping Equipment) of the Weapons group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1075-01-231-4621 |
| Primary Part Number | 18489-1VM |
| Item Name | Counterweight |
| FSC / FSG | 1075 / 10 — Degaussing and Mine Sweeping Equipment |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Reference Number Differentiating Characteristics | MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 18489-1VM | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 18489-1 | 5/9 Secondary reference United States Department of the Navy Dba Naval Surface Warfare Center Panama City |
| 6169243 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 1075-01-231-4621 is a Counterweight, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 1075, Degaussing and Mine Sweeping Equipment. Status: active.
NSN 1075-01-231-4621 has 1 manufacturer part number on file: 18489-1VM (Naval Inventory Control Point Mechanicsburg).
2 possible matches (shared part number, not a government interchangeability claim): 7530-01-610-5983, 6150-01-702-8686. Verify interchangeability with system specifications before substitution.
Key specifications for 18489-1VM: Reference Number Differentiating Characteristics: MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION. 1 specification is 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 1075-01-231-4621 has DEMIL Code B. 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.