The Pneumatic Muffler,exhaust-Intake, cataloged under National Stock Number 4730-01-668-7552, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-668-7552 |
| Primary Part Number | 074-1600 ITEM 33 CP |
| Item Name | Pneumatic Muffler,exhaust-Intake |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 074-1600 ITEM 33 CP | Naval Inventory Control Point Mechanicsburg (USA) |
| XM8158T32 OXYGEN CLEAN CP | Naval Inventory Control Point Mechanicsburg (USA) |
| XM8158T32 OXYGEN CLEANCP | Rix Industries (USA) |
| Reference | Meaning |
|---|---|
| XM8158T32 OXYGEN CLEAN | 3/1 Design control — primary reference Rix Industries |
| 074-1600 ITEM 33 | 5/1 Secondary reference Rix Industries |
NSN 4730-01-668-7552 is a Pneumatic Muffler,exhaust-Intake, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-668-7552 has 3 manufacturer part numbers on file: 074-1600 ITEM 33 CP (Naval Inventory Control Point Mechanicsburg), XM8158T32 OXYGEN CLEAN CP (Naval Inventory Control Point Mechanicsburg), XM8158T32 OXYGEN CLEANCP (Rix Industries).
Key specifications for 074-1600 ITEM 33 CP: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: SILENCER 1/4 MNPT; End Item Identification: CALIBRATION KIT O2 PRODUCTION PLANT; Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D. 2 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.