The Retainer,packing, cataloged under National Stock Number 5330-00-166-5625, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Kidde Technologies, Inc Div Kidde Aerospace and Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-166-5625 |
| Primary Part Number | 21225 |
| Item Name | Retainer,packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Kidde Technologies, Inc Div Kidde Aerospace and Defense |
| Status | ACTIVE |
| Outer Groove Depth | 0.0955 INCHES MINIMUM AND 0.0995 INCHES MAXIMUM IN |
| Attachment Hole Diameter | 0.133 INCHES MINIMUM AND 0.139 INCHES MAXIMUM IN |
| Attachment Feature Quantity | 1 |
| Cross-Sectional Height | 0.408 INCHES NOMINAL IN |
| Peripheral Diameter | 0.368 INCHES MINIMUM AND 0.372 INCHES MAXIMUM IN |
| Outer Groove Width | 0.190 INCHES NOMINAL IN |
| Center Hole Diameter | 0.133 INCHES MINIMUM AND 0.139 INCHES MAXIMUM IN |
| Material | COPPER ALLOY OVERALL |
| Attachment Method | ROUND HOLE |
| 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 |
|---|---|
| 21225 PRIMARY | Kidde Technologies, Inc Div Kidde Aerospace and Defense (USA) |
| Reference | Meaning |
|---|---|
| 21225 | 5/9 Secondary reference Kidde-Fenwal, Llc |
NSN 5330-00-166-5625 is a Retainer,packing, manufactured by Kidde Technologies, Inc Div Kidde Aerospace and Defense, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-166-5625 has 1 manufacturer part number on file: 21225 (Kidde Technologies, Inc Div Kidde Aerospace and Defense).
4 possible matches (shared part number, not a government interchangeability claim): 3110-00-193-0632, 5940-00-258-5723, 3020-01-110-6372. Verify interchangeability with system specifications before substitution.
Key specifications for 21225: Outer Groove Depth: 0.0955 INCHES MINIMUM AND 0.0995 INCHES MAXIMUM IN; Attachment Hole Diameter: 0.133 INCHES MINIMUM AND 0.139 INCHES MAXIMUM IN; Attachment Feature Quantity: 1; Cross-Sectional Height: 0.408 INCHES NOMINAL IN. 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.