The Spud W O-Ring, cataloged under National Stock Number 4220-01-648-0591, is classified within Federal Supply Class 4220 (Marine Lifesaving and Diving Equipment) of the Fire Fighting, Rescue, and Safety Equipment 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4220-01-648-0591 |
| Primary Part Number | 4055530CP |
| Item Name | Spud W O-Ring |
| FSC / FSG | 4220 / 42 — Marine Lifesaving and Diving Equipment |
| 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 |
|---|---|
| 4055530CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 4055530 OXYGEN CLEAN | 5/9 Secondary reference Draeger Safety, Inc. |
| 4055530 OXYGEN CLEANCP | 5/9 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 4055530 | 3/1 Design control — primary reference Draeger Inc |
| 4055530 | 5/9 Secondary reference Draeger Safety, Inc. |
NSN 4220-01-648-0591 is a Spud W O-Ring, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4220, Marine Lifesaving and Diving Equipment. Status: active.
NSN 4220-01-648-0591 has 1 manufacturer part number on file: 4055530CP (Naval Inventory Control Point Mechanicsburg).
Key specifications for 4055530CP: Criticality Code Justification: ZZZY; Special Features: NHA - FLEX GUAGE KIT; Part Name Assigned by Controlling Agency: SPUD W O-RING; End Item Identification: MK25 MOD2 UBA. 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.