The Ring,throat Convergent, cataloged under National Stock Number 5365-01-151-3789, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5365-01-151-3789 |
| Primary Part Number | 4543 PIECE 2 THRU 6 |
| Item Name | Ring,throat Convergent |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Todd Combustion Inc |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,AISI-321 OR 316-0.500 INCH THICK ONE FLANGE,25.000 INCHINSIDE DIAMETER BY 27.250 INCH OUTSIDE DIAMETER; RING 0.250 INCH STEEL,25.594 INCH INSIDE DIAMETER BY 26.156 INCH OUTSIDE DIAMETER; THROAT IS 21.062 INCH ACROSS BASE; STEEL; FIN,STEEL,TWELVE EACH,3.378 INCHES AT WIDEST EDGE BY 4.312 INCH HIGH BY 2.312 INCH ACROSS TOP FIN; STRAIGHT TIP; GUIDE LUGS 2 EACH,0.500 INCH THICK STEEL; 3.500 INCH OVERALL LENGTH 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 |
|---|---|
| 4543 PIECE 2 THRU 6 PRIMARY | Todd Combustion Inc (USA) |
| Reference | Meaning |
|---|---|
| 4543 PIECE 2 THRU 6 | 5/9 Secondary reference The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company |
| 4543 PIECE 2 THRU 6 | D/9 Drawing number reference only U.S. Government activity |
| 4543 PIECE 2 THRU 6 | C/1 Advisory reference — outside the item-of-supply concept Babcock & Wilcox Co |
NSN 5365-01-151-3789 is a Ring,throat Convergent, manufactured by Todd Combustion Inc, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-01-151-3789 has 1 manufacturer part number on file: 4543 PIECE 2 THRU 6 (Todd Combustion Inc).
Key specifications for 4543 PIECE 2 THRU 6: General Characteristics Item Description: STEEL,AISI-321 OR 316-0.500 INCH THICK ONE FLANGE,25.000 INCHINSIDE DIAMETER BY 27.250 INCH OUTSIDE DIAMETER; RING 0.250 INCH STEEL,25.594 INCH INSIDE DIAMETER BY 26.156 INCH OUTSIDE DIAMETER; THROAT IS 21.062 INCH ACROSS BASE; STEEL; FIN,STEEL,TWELVE EACH,3.378 INCHES AT WIDEST EDGE BY 4.312 INCH HIGH BY 2.312 INCH ACROSS TOP FIN; STRAIGHT TIP; GUIDE LUGS 2 EACH,0.500 INCH THICK STEEL; 3.500 INCH OVERALL LENGTH 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.