The Gasket, cataloged under National Stock Number 5330-01-476-7841, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Fm Af, Llc Dba American Fan Company. Government technical data includes 9 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-476-7841 |
| Primary Part Number | B4W-33551-25 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Fm Af, Llc Dba American Fan Company |
| Status | ACTIVE |
| Cross-Sectional Thickness | 0.062 INCHES NOMINAL IN |
| Style Designator | CIRCULAR |
| Material Document and Classification | FABREEKA, 3 PLY MFR REF ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 18.000 INCHES NOMINAL IN |
| Aperture Diameter | 13.250 INCHES NOMINAL IN |
| Bolt Hole Quantity | 8 |
| Bolt Circle Diameter | 16.000 INCHES NOMINAL IN |
| Material | RUBBER SYNTHETIC AND COTTON OVERALL |
| Hole Diameter | 0.688 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| 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 |
|---|---|
| 9W-71128 PC NO 35 | Fm Af, Llc Dba American Fan Company (USA) |
| B4W-33551-25 PRIMARY | Fm Af, Llc Dba American Fan Company (USA) |
| Reference | Meaning |
|---|---|
| 4W-33551 | D/9 Drawing number reference only New Philadelphia Fan Co Buffalo Forge Marine Fans |
| 4W-33551-25 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| B4W-33551-25 | 5/9 Secondary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
| 9W-71128 PC NO 35 | 5/9 Secondary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
NSN 5330-01-476-7841 is a Gasket, manufactured by Fm Af, Llc Dba American Fan Company, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-476-7841 has 2 manufacturer part numbers on file: 9W-71128 PC NO 35 (Fm Af, Llc Dba American Fan Company), B4W-33551-25 (Fm Af, Llc Dba American Fan Company).
Key specifications for B4W-33551-25: Cross-Sectional Thickness: 0.062 INCHES NOMINAL IN; Style Designator: CIRCULAR; Material Document and Classification: FABREEKA, 3 PLY MFR REF ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 18.000 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.