The O-Ring, cataloged under National Stock Number 5331-01-618-9920, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Mirada Research & Manufacturing, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-618-9920 |
| Primary Part Number | 018-90N552 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Mirada Research & Manufacturing, Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| 018-90N552 PRIMARY | Mirada Research & Manufacturing, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1-018-90 | 5/9 Secondary reference Mirada Research & Manufacturing, Inc. |
NSN 5331-01-618-9920 is a O-Ring, manufactured by Mirada Research & Manufacturing, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-618-9920 has 1 manufacturer part number on file: 018-90N552 (Mirada Research & Manufacturing, Inc.).
Key specifications for 018-90N552: Special Features: STORAGE CONDITIONS SHOULD BE CONSIDERED TO MAXIMIZE THE LIFE OF THE ELASTOMER O-RING AND ARE AS FOLLOWS:PRODUCT STORED INSIDE SEALED POLYETHYELENE BAGS;STORED AT TEMPERATURES NOT EXCEEDING 120 DEGREES FARENHEIT;EXCULUSION OF AIR, SUN LIGHT AND CONTAMINATION FROM PRODUCT. SHELF LIFE FOR ALL ELASTOMER O-RINGS USED ON OR WITH MIRADA PRODUCTS IS 15 YEARS.. 0 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.