The Sewing Machine,industrial, cataloged under National Stock Number 3530-01-181-1421, 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 Scott Leasing Company Inc. Dba Hoffman Brothers Div. Government technical data includes 18 specifications, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 3530-01-181-1421 |
| Primary Part Number | SZ-21-5-3N |
| Item Name | Sewing Machine,industrial |
| FSC / FSG | 3530 / 35 — Industrial Sewing Machines and Mobile Textile Repair Shops |
| Manufacturer | Scott Leasing Company Inc. Dba Hoffman Brothers Div |
| Status | ACTIVE |
| Feed Mechanism Design | STYLE A, DROP |
| Phase | SINGLE |
| Needle Type | SINGLE |
| Current Type | AC |
| Assembly Form | COMPLETE |
| Stitch Type | LOCK |
| Drive Type | POWER |
| Stand Design | RIGID |
| Table Mounting Type | FULLY SUBMERGED |
| Voltage in Volts | 110.0 AND 220.0 |
| Right of Needle Working Space | 10.000 INCHES MINIMUM AND 20.000 INCHES MAXIMUM IN |
| Sewing Type for Which Designed | ZIGZAG |
| Departure From Cited Designator | AS MODIFIED BY SPECIAL FEATURES |
| Nondefinitive Spec/std Data | 2 CLASS |
| Frequency Rating | 50.0 HERTZ MINIMUM AND 60.0 HERTZ MAXIMUM |
| Material | WOOD |
| Zigzag Sewing for Which Designed | FLAT STITCH AND ROPE ATTACHING AND ROPETACKING |
| Furnished Items | TABLE TOP AND TABLE STAND |
| 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 |
|---|---|
| SZ-21-5-3N | Scott Leasing Company Inc. Dba Hoffman Brothers Div (USA) |
| Reference | Meaning |
|---|---|
| 146RB | 5/9 Secondary reference U.S. Government activity |
| OO-S-00256/14 | 4/1 Identification reference U.S. Government activity |
| H-305-3 | 5/9 Secondary reference Unlimited Equipment, Inc |
| 146RB-2A | 3/2 Design control — primary reference U.S. Government activity |
NSN 3530-01-181-1421 is a Sewing Machine,industrial, manufactured by Scott Leasing Company Inc. Dba Hoffman Brothers Div, classified under FSC 3530, Industrial Sewing Machines and Mobile Textile Repair Shops. Status: active.
NSN 3530-01-181-1421 has 1 manufacturer part number on file: SZ-21-5-3N (Scott Leasing Company Inc. Dba Hoffman Brothers Div).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-580-6285. Verify interchangeability with system specifications before substitution.
Key specifications for SZ-21-5-3N: Feed Mechanism Design: STYLE A, DROP; Phase: SINGLE; Needle Type: SINGLE; Current Type: AC. 18 specifications are 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.