The O-Ring, cataloged under National Stock Number 5331-00-471-5621, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Pall Corporation. Government technical data includes 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-471-5621 |
| Primary Part Number | MB1000-32D5 GOVPK |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Pall Corporation |
| Status | ACTIVE |
| Cross-Sectional Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Center Hole Diameter | 6.695 INCHES MINIMUM AND 6.755 INCHES MAXIMUM IN |
| Material | RUBBER SYNTHETIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MB1000-32D5 GOVPK PRIMARY | Pall Corporation (USA) |
| Reference | Meaning |
|---|---|
| MB1000-3205 | C/1 Advisory reference — outside the item-of-supply concept Pall Corporation |
| 5331PL1377462 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MB-1000-32D5 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5331-00-471-5621 is a O-Ring, manufactured by Pall Corporation, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-471-5621 has 1 manufacturer part number on file: MB1000-32D5 GOVPK (Pall Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-380-2716. Verify interchangeability with system specifications before substitution.
Key specifications for MB1000-32D5 GOVPK: Cross-Sectional Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Center Hole Diameter: 6.695 INCHES MINIMUM AND 6.755 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 3 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.