The Packing Assembly, cataloged under National Stock Number 5330-00-395-5347, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5330-00-395-5347 |
| Primary Part Number | ST7M254-129E2 |
| Item Name | Packing Assembly |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Temp Rating | -70.0 FAHRENHEIT AND 600.0 FAHRENHEIT DEGF |
| Intermediate Ring Quantity | 1 |
| Outside Diameter | 1.756 INCHES NOMINAL IN |
| Material Document and Classification | MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE INTERMEDIATE RING |
| 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 | SPECIAL INTERMEDIATE RING |
| Inside Diameter | 1.550 INCHES NOMINAL IN |
| Height | 0.177 INCHES NOMINAL IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR INTERMEDIATE RING |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE BOTTOM RING |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE TOP 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 |
|---|---|
| ST7M254-129E2 PRIMARY | The Boeing Company Div Defense (USA) |
| 7129MS160-5708 | Greene Tweed & Co Inc (USA) |
| S38421-129BAK1S | Trelleborg Sealing Solutions Us, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 082-59990-129MS | 7/2 Vendor item drawing reference U.S. Government activity |
| 7129MS160-5708 | 5/9 Secondary reference Palmetto Inc |
NSN 5330-00-395-5347 is a Packing Assembly, manufactured by The Boeing Company Div Defense, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-395-5347 has 3 manufacturer part numbers on file: ST7M254-129E2 (The Boeing Company Div Defense), 7129MS160-5708 (Greene Tweed & Co Inc), S38421-129BAK1S (Trelleborg Sealing Solutions Us, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-086-7897. Verify interchangeability with system specifications before substitution.
Key specifications for ST7M254-129E2: Temp Rating: -70.0 FAHRENHEIT AND 600.0 FAHRENHEIT DEGF; Intermediate Ring Quantity: 1; Outside Diameter: 1.756 INCHES NOMINAL IN; Material Document and Classification: MIL-P-25732 MIL SPEC SINGLE MATERIAL RESPONSE INTERMEDIATE RING. 14 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.