The O-Ring, cataloged under National Stock Number 5331-00-219-2636, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-219-2636 |
| Primary Part Number | 519-72 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Cross-Sectional Height | 0.055 INCHES MINIMUM AND 0.061 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.264 INCHES MINIMUM AND 1.276 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| 519-72 PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 519-72 | 5/9 Secondary reference Donallco Inc |
| 519-72 | 5/9 Secondary reference U.S. Government activity |
NSN 5331-00-219-2636 is a O-Ring, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-219-2636 has 1 manufacturer part number on file: 519-72 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
3 possible matches (shared part number, not a government interchangeability claim): 5940-00-512-7599, 6625-01-295-8020, 5340-01-715-9658. Verify interchangeability with system specifications before substitution.
Key specifications for 519-72: Cross-Sectional Height: 0.055 INCHES MINIMUM AND 0.061 INCHES MAXIMUM IN; Center Hole Diameter: 1.264 INCHES MINIMUM AND 1.276 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 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.