The Tension Assembly,th, cataloged under National Stock Number 3530-01-397-0521, is classified within Federal Supply Class 3530 (Industrial Sewing Machines and Mobile Textile Repair Shops) of the Service and Trade Equipment group. The manufacturer of record is Singer Co the United States Div - Sewing Products Group. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Tension Assembly,th |
| FSC / FSG | 3530 — Industrial Sewing Machines and Mobile Textile Repair Shops (FSG 35) |
| Manufacturers | Singer Co the United States Div - Sewing Products Group (CAGE 21305) |
| Parameter | Value |
|---|---|
| NSN | 3530-01-397-0521 |
| Primary Part Number | 410677 |
| Item Name | Tension Assembly,th |
| FSC / FSG | 3530 / 35 — Industrial Sewing Machines and Mobile Textile Repair Shops |
| Manufacturer | Singer Co the United States Div - Sewing Products Group |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 410677 PRIMARY | Singer Co the United States Div - Sewing Products Group (USA) |
| Reference | Meaning |
|---|---|
| 410522 | 5/9 Secondary reference Bellow Machine Co (international) Ltd |
| 410522 | 5/9 Secondary reference Singer Co the United States Div - Sewing Products Group |
NSN 3530-01-397-0521 is a Tension Assembly,th, manufactured by Singer Co the United States Div - Sewing Products Group, classified under FSC 3530, Industrial Sewing Machines and Mobile Textile Repair Shops. Status: active.
NSN 3530-01-397-0521 has 1 manufacturer part number on file: 410677 (Singer Co the United States Div - Sewing Products Group).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-703-3459. Verify interchangeability with system specifications before substitution.
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.