The Seal,plain, cataloged under National Stock Number 5330-01-048-9217, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Bal Seal Engineering, Inc.. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-048-9217 |
| Primary Part Number | 304A137 |
| Item Name | Seal,plain |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Bal Seal Engineering, Inc. |
| Status | ACTIVE |
| Seal Width | 0.130 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Housing Bore Diameter | 2.255 INCHES NOMINAL IN |
| Material Document and Classification | AMS 3651C ASSN STD SINGLE MATERIAL RESPONSE SEALING ELEMENT |
| Material Document and Classification | QQ-W-423 MIL SPEC SINGLE MATERIAL RESPONSE SPRING |
| Cross-Sectional Shape Style | C-SECTION W/ HELICAL SPRING |
| Accommodated Shaft Diameter | 2.063 INCHES NOMINAL IN |
| Material | STEEL SPRING |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEALING ELEMENT |
| Construction | SOLID |
| 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 |
|---|---|
| 304A137 PRIMARY | Bal Seal Engineering, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2775179-101 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5330-01-048-9217 is a Seal,plain, manufactured by Bal Seal Engineering, Inc., classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-048-9217 has 1 manufacturer part number on file: 304A137 (Bal Seal Engineering, Inc.).
Key specifications for 304A137: Seal Width: 0.130 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN; Housing Bore Diameter: 2.255 INCHES NOMINAL IN; Material Document and Classification: AMS 3651C ASSN STD SINGLE MATERIAL RESPONSE SEALING ELEMENT; Material Document and Classification: QQ-W-423 MIL SPEC SINGLE MATERIAL RESPONSE SPRING. 9 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.