The Sleeve,position,jacket Tube, cataloged under National Stock Number 4530-01-122-3718, is classified within Federal Supply Class 4530 (Fuel Burning Equipment Units) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Todd Combustion Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4530-01-122-3718 |
| Primary Part Number | N-D-40641 PC49 |
| Item Name | Sleeve,position,jacket Tube |
| FSC / FSG | 4530 / 45 — Fuel Burning Equipment Units |
| Manufacturer | Todd Combustion Inc |
| Status | ACTIVE |
| General Characteristics Item Description | SM.STEEL TUBING,MIL-T-20157 TYPE E;5.563 IN. O/A LG;1.750 IN. OD; 1.532 IN. I.D. IN |
| 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 |
|---|---|
| N-D-40641 PC49 PRIMARY | Todd Combustion Inc (USA) |
| 13749 | Todd Combustion Inc (USA) |
| Reference | Meaning |
|---|---|
| D-40641 | D/9 Drawing number reference only Todd Combustion Inc |
NSN 4530-01-122-3718 is a Sleeve,position,jacket Tube, manufactured by Todd Combustion Inc, classified under FSC 4530, Fuel Burning Equipment Units. Status: active.
NSN 4530-01-122-3718 has 2 manufacturer part numbers on file: N-D-40641 PC49 (Todd Combustion Inc), 13749 (Todd Combustion Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5325-01-163-6137, 5660-01-248-6724, 6625-01-577-6744. Verify interchangeability with system specifications before substitution.
Key specifications for N-D-40641 PC49: General Characteristics Item Description: SM.STEEL TUBING,MIL-T-20157 TYPE E;5.563 IN. O/A LG;1.750 IN. OD; 1.532 IN. I.D. IN. 1 specification is 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.