The Sealer,chemical, cataloged under National Stock Number 6850-01-218-4358, is classified within Federal Supply Class 6850 (Miscellaneous Chemical Specialties) of the Chemicals and Chemical Products group. The manufacturer of record is The Boeing Company Div Defense. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6850-01-218-4358 |
| Primary Part Number | MMS332 A-4 2OZ |
| Item Name | Sealer,chemical |
| FSC / FSG | 6850 / 68 — Miscellaneous Chemical Specialties |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Supplementary Features | 2 OUNCE IN 2-1/2 OUNCE CARTRIDGE OZ |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MMS332 A-4 2OZ | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| PR-1750 A-4 2OZ | 3/2 Design control — primary reference U.S. Government activity |
| PR-1750 A-4 | 3/1 Design control — primary reference U.S. Government activity |
| MMS332 A-4 | 5/1 Secondary reference The Boeing Company Div Defense |
NSN 6850-01-218-4358 is a Sealer,chemical, manufactured by The Boeing Company Div Defense, classified under FSC 6850, Miscellaneous Chemical Specialties. Status: active.
NSN 6850-01-218-4358 has 1 manufacturer part number on file: MMS332 A-4 2OZ (The Boeing Company Div Defense).
1 possible match (shared part number, not a government interchangeability claim): 8030-01-590-4104. Verify interchangeability with system specifications before substitution.
Key specifications for MMS332 A-4 2OZ: Supplementary Features: 2 OUNCE IN 2-1/2 OUNCE CARTRIDGE OZ; Special Features: POLYSULFIDE; 4 HOUR WORKING TIME; COLOR: GRAY; PHYSICAL FORM: PASTE; MATERIAL: RUBBER SYNTHETIC; RATED DRYING TIME: 30.00 HOURS MAXIMUM; SPECIFIC USAGE: FOR SEALING FASTENER IN AIRCRAFT INTEGRAL FUEL TANKS AND FOR FUSELAGE SEALING APPLICATIONS; SEPERATE CATALYST; QUANTITY WITHIN EACH UNIT PACKAGE: 2.00 OUNCES; OZ. 1 specification is documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). 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.