The Retainer,packing, cataloged under National Stock Number 5330-00-633-7993, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-633-7993 |
| Primary Part Number | NC266 |
| Item Name | Retainer,packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer |
| Status | ACTIVE |
| Attachment Hole Diameter | 0.125 INCHES NOMINAL IN |
| Attachment Feature Quantity | 2 |
| Cross-Sectional Height | 0.500 INCHES NOMINAL IN |
| Body Recess Diameter | 0.562 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | FLANGE |
| Flanged Body Outside Diameter | 2.219 INCHES NOMINAL IN |
| Peripheral Diameter | 2.719 INCHES NOMINAL IN |
| Center Hole Diameter | 1.750 INCHES NOMINAL IN |
| Material | COPPER ALLOY OVERALL |
| Body Recess Depth | 0.156 INCHES NOMINAL IN |
| Attachment Method | ROUND HOLE |
| 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 |
|---|---|
| NC266 PRIMARY | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA) |
| Reference | Meaning |
|---|---|
| 990700 | 5/9 Secondary reference Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer |
| 1230-633-7993 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
NSN 5330-00-633-7993 is a Retainer,packing, manufactured by Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-633-7993 has 1 manufacturer part number on file: NC266 (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer).
1 possible match (shared part number, not a government interchangeability claim): 6550-01-465-8793. Verify interchangeability with system specifications before substitution.
Key specifications for NC266: Attachment Hole Diameter: 0.125 INCHES NOMINAL IN; Attachment Feature Quantity: 2; Cross-Sectional Height: 0.500 INCHES NOMINAL IN; Body Recess Diameter: 0.562 INCHES NOMINAL IN. 11 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.