The Retainer,packing, cataloged under National Stock Number 5330-01-145-4577, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Vitok Engineers Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-145-4577 |
| Primary Part Number | LUNK 3151 MODIFIED STEM PACKING |
| Item Name | Retainer,packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Vitok Engineers Inc |
| Status | ACTIVE |
| Material Document and Classification | ASTM B16 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | COPPER ALLOY 360 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| LUNK 3151 MODIFIED STEM PACKING | Vitok Engineers Inc (USA) |
| Reference | Meaning |
|---|---|
| DS-52228-1/2IN-15 | 5/9 Secondary reference U.S. Government activity |
| 300421V5 | 3/9 Design control — primary reference Lunkenheimer Co |
NSN 5330-01-145-4577 is a Retainer,packing, manufactured by Vitok Engineers Inc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-145-4577 has 1 manufacturer part number on file: LUNK 3151 MODIFIED STEM PACKING (Vitok Engineers Inc).
Key specifications for LUNK 3151 MODIFIED STEM PACKING: Material Document and Classification: ASTM B16 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Material: COPPER ALLOY 360 OVERALL. 2 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.