The Packing,preformed, cataloged under National Stock Number 5330-01-121-8531, 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 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-121-8531 |
| Primary Part Number | ST7M258-250 |
| Item Name | Packing,preformed |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Temp Rating | -65.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.225 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | OVAL |
| Peripheral Diameter | 3.100 INCHES NOMINAL IN |
| Center Hole Diameter | 2.470 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN |
| Material | GLASS AND RUBBER SYNTHETIC OVERALL |
| 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 |
|---|---|
| 460-250 | Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc (USA) |
| ST7M258-250 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5330-01-121-8531 is a Packing,preformed, manufactured by The Boeing Company Div Defense, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-121-8531 has 2 manufacturer part numbers on file: 460-250 (Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc), ST7M258-250 (The Boeing Company Div Defense).
Key specifications for ST7M258-250: Temp Rating: -65.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.225 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Cross-Sectional Shape Style: OVAL; Peripheral Diameter: 3.100 INCHES NOMINAL IN. 6 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.