The Gear Assembly,speed Decreaser, cataloged under National Stock Number 3010-01-321-8495, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is M-B Co Inc of Wisconsin Sweeper Div. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3010-01-321-8495 |
| Primary Part Number | 501-81638 |
| Item Name | Gear Assembly,speed Decreaser |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | M-B Co Inc of Wisconsin Sweeper Div |
| Status | ACTIVE |
| Total Ratio | 3.50 TO 1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 501-81638 PRIMARY | M-B Co Inc of Wisconsin Sweeper Div (USA) |
| Reference | Meaning |
|---|---|
| 81638 | 5/9 Secondary reference M-B Companies, Inc. |
| 501-81638 | 5/9 Secondary reference M-B Companies, Inc. |
NSN 3010-01-321-8495 is a Gear Assembly,speed Decreaser, manufactured by M-B Co Inc of Wisconsin Sweeper Div, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-01-321-8495 has 1 manufacturer part number on file: 501-81638 (M-B Co Inc of Wisconsin Sweeper Div).
2 possible matches (shared part number, not a government interchangeability claim): 5330-01-330-0647, 5120-01-652-1111. Verify interchangeability with system specifications before substitution.
Key specifications for 501-81638: Total Ratio: 3.50 TO 1; End Item Identification: M-B CO INC. MODEL SW314 STREET SWEEPER BROOM FRAME. 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.
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.