The Ring,lantern, cataloged under National Stock Number 4320-01-218-1791, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Fluid Handling Llc. Government technical data includes 5 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-218-1791 |
| Primary Part Number | 3LR3001-6 |
| Item Name | Ring,lantern |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Fluid Handling Llc |
| Status | ACTIVE |
| Outside Diameter | 6.438 INCHES NOMINAL IN |
| Material Document and Classification | MIL-M-16576 GR.A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Inside Diameter | 6.000 INCHES NOMINAL IN |
| Height | 0.375 INCHES NOMINAL IN |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| 3LR3001-6 PRIMARY | Fluid Handling Llc (USA) |
| 4M642A4 PIECE 6 | Fluid Handling Llc (USA) |
| Reference | Meaning |
|---|---|
| 4M642A4 | D/9 Drawing number reference only Itt Corporation Dba Itt Standard |
| 3LR3001 | D/9 Drawing number reference only Itt Corporation Dba Itt Standard |
| 4M642A4 PIECE 6 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 3LR3001-6 | 3/9 Design control — primary reference Itt Corporation Dba Itt Standard |
NSN 4320-01-218-1791 is a Ring,lantern, manufactured by Fluid Handling Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-218-1791 has 2 manufacturer part numbers on file: 3LR3001-6 (Fluid Handling Llc), 4M642A4 PIECE 6 (Fluid Handling Llc).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-235-3206. Verify interchangeability with system specifications before substitution.
Key specifications for 3LR3001-6: Outside Diameter: 6.438 INCHES NOMINAL IN; Material Document and Classification: MIL-M-16576 GR.A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Inside Diameter: 6.000 INCHES NOMINAL IN; Height: 0.375 INCHES NOMINAL IN. 5 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.