The Packing Assembly, cataloged under National Stock Number 5330-01-421-3393, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Trelleborg Sealing Solutions Us, Inc.. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-421-3393 |
| Primary Part Number | S38422-325BAK-1 |
| Item Name | Packing Assembly |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Trelleborg Sealing Solutions Us, Inc. |
| Status | ACTIVE |
| Temp Rating | -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF |
| Intermediate Ring Quantity | 1 |
| Outside Diameter | 1.867 INCHES NOMINAL IN |
| Material Document and Classification | MIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE BOTTOM RING |
| Material Document and Classification | MIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE TOP RING |
| Cross-Sectional Shape Style | SQUARE/RECTANGULAR BOTTOM RING |
| Cross-Sectional Shape Style | SQUARE/RECTANGULAR TOP RING |
| Cross-Sectional Shape Style | TEE INTERMEDIATE RING |
| Inside Diameter | 1.472 INCHES NOMINAL IN |
| Height | 0.416 INCHES NOMINAL IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE BOTTOM RING |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE TOP RING |
| Material | RUBBER BUTADIENE NITRILE INTERMEDIATE RING |
| Joint Type | SCARF-PERIPHERAL TOP RING |
| Joint Type | SCARF-PERIPHERAL BOTTOM 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 |
|---|---|
| ST7M254-325-3 | The Boeing Company Div Defense (USA) |
| S38422-325BAK-1 PRIMARY | Trelleborg Sealing Solutions Us, Inc. (USA) |
| 7325MT-160-T PRIMARY | Greene Tweed & Co Inc (USA) |
NSN 5330-01-421-3393 is a Packing Assembly, manufactured by Trelleborg Sealing Solutions Us, Inc., classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-421-3393 has 3 manufacturer part numbers on file: ST7M254-325-3 (The Boeing Company Div Defense), S38422-325BAK-1 (Trelleborg Sealing Solutions Us, Inc.), 7325MT-160-T (Greene Tweed & Co Inc).
Key specifications for S38422-325BAK-1: Temp Rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF; Intermediate Ring Quantity: 1; Outside Diameter: 1.867 INCHES NOMINAL IN; Material Document and Classification: MIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE BOTTOM RING. 15 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.