The Reamer,machine, cataloged under National Stock Number 3455-01-332-9668, is classified within Federal Supply Class 3455 (Cutting Tools for Machine Tools) of the Metalworking Machinery (continued) group. The manufacturer of record is Union Butterfield Tivoly. Government technical data includes 8 specifications, 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 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 | 3455-01-332-9668 |
| Primary Part Number | 4543-1/4 |
| Item Name | Reamer,machine |
| FSC / FSG | 3455 / 34 — Cutting Tools for Machine Tools |
| Manufacturer | Union Butterfield Tivoly |
| Status | ACTIVE |
| Shank Diameter | 0.240 INCHES NOMINAL IN |
| Flute Design | SPIRAL |
| Overall Diameter | 0.250 INCHES NOMINAL IN |
| Flute Cut Direction | RIGHT-HAND |
| Flute Length | 1.500 INCHES NOMINAL IN |
| Flute Quantity | 6 |
| Material | STEEL LOCATION NOT OTHERWISE SPECIFIED |
| Reamer Type | FLUTED CHUCKING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3455-01-332-9668 is a Reamer,machine, manufactured by Union Butterfield Tivoly, classified under FSC 3455, Cutting Tools for Machine Tools. Status: active.
NSN 3455-01-332-9668 has 2 manufacturer part numbers on file: 4543-1/4 (Union Butterfield Tivoly), 50-10013 (Union Butterfield Tivoly).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-682-6001. Verify interchangeability with system specifications before substitution.
Key specifications for 4543-1/4: Shank Diameter: 0.240 INCHES NOMINAL IN; Flute Design: SPIRAL; Overall Diameter: 0.250 INCHES NOMINAL IN; Flute Cut Direction: RIGHT-HAND. 8 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.