The Retainer,packing, cataloged under National Stock Number 5330-01-050-4268, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 12 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5330-01-050-4268 |
| Primary Part Number | 12266631 |
| Item Name | Retainer,packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Outer Groove Depth | 0.055 INCHES NOMINAL IN |
| Attachment Hole Diameter | 0.086 INCHES NOMINAL IN |
| Attachment Feature Quantity | 4 |
| Cross-Sectional Height | 0.100 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | SPECIAL |
| Attachment Feature Circle Diameter | 2.750 INCHES NOMINAL OVERALL IN |
| Peripheral Diameter | 3.441 INCHES MINIMUM AND 3.447 INCHES MAXIMUM IN |
| Outer Groove Width | 0.055 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OVERALL |
| Center Hole Diameter | 2.458 INCHES NOMINAL IN |
| Material | ALUMINUM 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 |
|---|---|
| 12266631 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 6558-254 | 5/9 Secondary reference Recon/optical, Inc. |
| 6558-254 | 5/9 Secondary reference U.S. Government activity |
| 12266631 | 5/9 Secondary reference Drs Sustainment Systems, Inc. |
NSN 5330-01-050-4268 is a Retainer,packing, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-050-4268 has 1 manufacturer part number on file: 12266631 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 5905-01-095-1374. Verify interchangeability with system specifications before substitution.
Key specifications for 12266631: Outer Groove Depth: 0.055 INCHES NOMINAL IN; Attachment Hole Diameter: 0.086 INCHES NOMINAL IN; Attachment Feature Quantity: 4; Cross-Sectional Height: 0.100 INCHES NOMINAL IN. 12 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.