The O-Ring, cataloged under National Stock Number 5331-01-513-6820, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Bombardier Wien Schienenfahrzeuge Ag. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-513-6820 |
| Primary Part Number | DIN 3771-6,4X1,8-N FPM 75 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Bombardier Wien Schienenfahrzeuge Ag |
| Status | ACTIVE |
| Cross-Sectional Height | 1.8 MILLIMETERS NOMINAL MM |
| Hardness Rating | 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM |
| Center Hole Diameter | 6.4 MILLIMETERS NOMINAL MM |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| 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 |
|---|---|
| DIN 3771-6,4X1,8-N FPM 75 PRIMARY | Bombardier Wien Schienenfahrzeuge Ag (AUT) |
| 430-205 PRIMARY | Bombardier Transportation Austria Gmbh (AUT) |
| 430-205 PRIMARY | Bombardier Wien Schienenfahrzeuge Ag (AUT) |
| DIN 3771-6,4X1,8-N FPM 75 | Bombardier Transportation Austria Gmbh (AUT) |
| Reference | Meaning |
|---|---|
| DIN 3771-6,4X1,8-N FPM 75 | 5/9 Secondary reference Bombardier Wien Schienenfahrzeuge Ag |
| 430-205 | 3/9 Design control — primary reference Bombardier Wien Schienenfahrzeuge Ag |
NSN 5331-01-513-6820 is a O-Ring, manufactured by Bombardier Wien Schienenfahrzeuge Ag, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-513-6820 has 4 manufacturer part numbers on file: DIN 3771-6,4X1,8-N FPM 75 (Bombardier Wien Schienenfahrzeuge Ag), 430-205 (Bombardier Transportation Austria Gmbh), 430-205 (Bombardier Wien Schienenfahrzeuge Ag), DIN 3771-6,4X1,8-N FPM 75 (Bombardier Transportation Austria Gmbh).
3 possible matches (shared part number, not a government interchangeability claim): 5340-01-611-0826, 5340-01-615-2168, 4240-01-657-1373. Verify interchangeability with system specifications before substitution.
Key specifications for DIN 3771-6,4X1,8-N FPM 75: Cross-Sectional Height: 1.8 MILLIMETERS NOMINAL MM; Hardness Rating: 70.0 SHORE DUROMETER A MINIMUM AND 80.0 SHORE DUROMETER A MAXIMUM; Center Hole Diameter: 6.4 MILLIMETERS NOMINAL MM; End Item Identification: RQ-1. 4 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.