The Seal,plain, cataloged under National Stock Number 5330-01-154-6797, 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 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5330-01-154-6797 |
| Primary Part Number | 305A-240 |
| Item Name | Seal,plain |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Bal Seal Engineering, Inc. |
| Status | ACTIVE |
| Temp Rating | -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF |
| Seal Width | 0.128 INCHES MINIMUM AND 0.134 INCHES MAXIMUM IN |
| Housing Bore Diameter | 3.999 INCHES MINIMUM AND 4.025 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE SPRING |
| Material Document and Classification | AMS 3651 ASSN STD SINGLE MATERIAL RESPONSE SEALING ELEMENT |
| Cross-Sectional Shape Style | C-SECTION W/ HELICAL SPRING |
| Accommodated Shaft Diameter | 3.743 INCHES MINIMUM AND 3.757 INCHES MAXIMUM IN |
| Material | STEEL COMP 302 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 |
|---|---|
| 305A-240 PRIMARY | Bal Seal Engineering, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 5189268-002 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 5330-01-154-6797 is a Seal,plain, manufactured by Bal Seal Engineering, Inc., classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-154-6797 has 1 manufacturer part number on file: 305A-240 (Bal Seal Engineering, Inc.).
Key specifications for 305A-240: Temp Rating: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF; Seal Width: 0.128 INCHES MINIMUM AND 0.134 INCHES MAXIMUM IN; Housing Bore Diameter: 3.999 INCHES MINIMUM AND 4.025 INCHES MAXIMUM IN; Material Document and Classification: QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE SPRING. 10 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.