The Seal,plain Encased, cataloged under National Stock Number 5330-01-494-0526, 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 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5330-01-494-0526 |
| Primary Part Number | 634931 |
| Item Name | Seal,plain Encased |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer |
| Status | ACTIVE |
| Material | STEEL COMP 316 CASE |
| Material | RUBBER SYNTHETIC INNER RING |
| 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 |
|---|---|
| 634931 PRIMARY | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA) |
| Reference | Meaning |
|---|---|
| 1801490 ITEM NO 89E | 5/9 Secondary reference Blackmer System One, Inc. Div Blackmer System One, Inc. |
| 1801490 ITEM NO.89B,89E | 5/9 Secondary reference Blackmer System One, Inc. Div Blackmer System One, Inc. |
| 1801490 ITEM NO 89B | 5/9 Secondary reference Blackmer System One, Inc. Div Blackmer System One, Inc. |
| 634931 | 3/9 Design control — primary reference Blackmer System One, Inc. Div Blackmer System One, Inc. |
NSN 5330-01-494-0526 is a Seal,plain Encased, manufactured by Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-494-0526 has 1 manufacturer part number on file: 634931 (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer).
Key specifications for 634931: Part Name Assigned by Controlling Agency: SEAL,LABYRINTH ROTOR; End Item Identification: PUMP ASSY CTFGL;USN FRM 0150LB 8X10-13,12.23IMP W/180 SEAL LBS; Material: STEEL COMP 316 CASE; Material: RUBBER SYNTHETIC INNER RING. 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.