The Mandrel,roller Tube Expander, cataloged under National Stock Number 3456-00-331-9963, is classified within Federal Supply Class 3456 (Cutting and Forming Tools for Secondary Metalworking Machinery) of the Metalworking Machinery (continued) group. The manufacturer of record is Babcock & Wilcox Co. Government technical data includes 6 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. 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 | 3456-00-331-9963 |
| Primary Part Number | 6M19 |
| Item Name | Mandrel,roller Tube Expander |
| FSC / FSG | 3456 / 34 — Cutting and Forming Tools for Secondary Metalworking Machinery |
| Manufacturer | Babcock & Wilcox Co |
| Status | ACTIVE |
| Hand Turning Rod | NOT INCLUDED |
| Square Shank Length | 0.750 INCHES NOMINAL IN |
| Drive Type | SQUARE |
| Taper Major Diameter | 0.578 INCHES NOMINAL IN |
| Size Designator | 0.625 INCHES NOMINAL IN |
| Operation Method | MANUAL OR POWER |
| 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 |
|---|---|
| 6M19 PRIMARY | Babcock & Wilcox Co (USA) |
NSN 3456-00-331-9963 is a Mandrel,roller Tube Expander, manufactured by Babcock & Wilcox Co, classified under FSC 3456, Cutting and Forming Tools for Secondary Metalworking Machinery. Status: active.
NSN 3456-00-331-9963 has 1 manufacturer part number on file: 6M19 (Babcock & Wilcox Co).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-388-7972. Verify interchangeability with system specifications before substitution.
Key specifications for 6M19: Hand Turning Rod: NOT INCLUDED; Square Shank Length: 0.750 INCHES NOMINAL IN; Drive Type: SQUARE; Overall Length: 9.875 INCHES NOMINAL IN. 6 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.