The Gasket, cataloged under National Stock Number 5330-01-004-4900, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Industrial Acoustics Company, Inc. Dba I a C Div Iac Acoustics. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5330-01-004-4900 |
| Primary Part Number | B21-1 |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Industrial Acoustics Company, Inc. Dba I a C Div Iac Acoustics |
| Status | ACTIVE |
| Supplementary Features | CROSS-SECTIONAL SHAPE STYLE:NO.195 IRREGULAR SHAPE FROM FIIG A03200 |
| 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 |
|---|---|
| B21-1 PRIMARY | Industrial Acoustics Company, Inc. Dba I a C Div Iac Acoustics (USA) |
| Reference | Meaning |
|---|---|
| B-7212-234-21-1 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5330-01-004-4900 is a Gasket, manufactured by Industrial Acoustics Company, Inc. Dba I a C Div Iac Acoustics, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-004-4900 has 1 manufacturer part number on file: B21-1 (Industrial Acoustics Company, Inc. Dba I a C Div Iac Acoustics).
3 possible matches (shared part number, not a government interchangeability claim): 6115-01-296-5908, 5998-01-443-8612, 5360-01-732-9302. Verify interchangeability with system specifications before substitution.
Key specifications for B21-1: Supplementary Features: CROSS-SECTIONAL SHAPE STYLE:NO.195 IRREGULAR SHAPE FROM FIIG A03200; Special Features: STYLE DESIGNATOR:NO.60 IRREGULAR SHAPE FROM FIIG A03200. 1 specification is 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.