The Reamer,machine, cataloged under National Stock Number 3455-01-336-4976, is classified within Federal Supply Class 3455 (Cutting Tools for Machine Tools) of the Metalworking Machinery (continued) group. The manufacturer of record is Tivoly U S a Union Butterfield Div. 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 | 3455-01-336-4976 |
| Primary Part Number | 4537-1 |
| Item Name | Reamer,machine |
| FSC / FSG | 3455 / 34 — Cutting Tools for Machine Tools |
| Manufacturer | Tivoly U S a Union Butterfield Div |
| Status | ACTIVE |
| Flute Design | HELICAL |
| Helix Direction | RIGHT-HAND |
| Shank Type | MORSE TAPER |
| Flute Length | 2.750 INCHES NOMINAL IN |
| Diameter | 1.000 INCHES NOMINAL IN |
| Shank Taper Number | 3 |
| Flute Quantity | 8 |
| 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 3455-01-336-4976 is a Reamer,machine, manufactured by Tivoly U S a Union Butterfield Div, classified under FSC 3455, Cutting Tools for Machine Tools. Status: active.
NSN 3455-01-336-4976 has 2 manufacturer part numbers on file: 4537-1 (Tivoly U S a Union Butterfield Div), 50-10164 (Tivoly U S a Union Butterfield Div).
1 possible match (shared part number, not a government interchangeability claim): 6145-01-357-1804. Verify interchangeability with system specifications before substitution.
Key specifications for 4537-1: Flute Design: HELICAL; Helix Direction: RIGHT-HAND; Shank Type: MORSE TAPER; Flute Length: 2.750 INCHES NOMINAL IN. 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.