The Adjusting Device,belt-Chain Tens, cataloged under National Stock Number 3040-01-391-9917, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Altra Industrial Motion Corp.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-391-9917 |
| Primary Part Number | 61BG |
| Item Name | Adjusting Device,belt-Chain Tens |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Altra Industrial Motion Corp. |
| Status | ACTIVE |
| General Characteristics Item Description | SPRING LOADED PIVOT ARM 90 DEGREE, USED WITH CHAIN NUMBER 50 AND 60 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3040-01-391-9917 is a Adjusting Device,belt-Chain Tens, manufactured by Altra Industrial Motion Corp., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-391-9917 has 2 manufacturer part numbers on file: 48887 (Altra Industrial Motion Corp.), 61BG (Altra Industrial Motion Corp.).
1 possible match (shared part number, not a government interchangeability claim): 6525-01-698-6477. Verify interchangeability with system specifications before substitution.
Key specifications for 61BG: Overall Height: 4.250 INCHES NOMINAL IN; General Characteristics Item Description: SPRING LOADED PIVOT ARM 90 DEGREE, USED WITH CHAIN NUMBER 50 AND 60; Overall Length: 9.500 INCHES NOMINAL IN; End Item Identification: 3910-01-376-0431. 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.