The Tensioner,drive,chain and Belts, cataloged under National Stock Number 3020-01-184-4378, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Brewer Machine & Gear Co. 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. 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 | 3020-01-184-4378 |
| Primary Part Number | SM |
| Item Name | Tensioner,drive,chain and Belts |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Brewer Machine & Gear Co |
| Status | ACTIVE |
| General Characteristics Item Description | IRREGULAR SHAPE; 4.625 IN. LG; CONTROLS TENSION ON A 360 DEG ARC; W/SERRATED PAD TO PREVENT SLIPPAGE,AND FEATURES TWO BOLT MTG IN |
| 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 |
|---|---|
| SM PRIMARY | Brewer Machine & Gear Co (USA) |
NSN 3020-01-184-4378 is a Tensioner,drive,chain and Belts, manufactured by Brewer Machine & Gear Co, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-184-4378 has 1 manufacturer part number on file: SM (Brewer Machine & Gear Co).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-428-0308. Verify interchangeability with system specifications before substitution.
Key specifications for SM: General Characteristics Item Description: IRREGULAR SHAPE; 4.625 IN. LG; CONTROLS TENSION ON A 360 DEG ARC; W/SERRATED PAD TO PREVENT SLIPPAGE,AND FEATURES TWO BOLT MTG IN; End Item Identification: 3910-01-132-6891. 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.