The O-Ring, cataloged under National Stock Number 5331-00-684-7940, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems. Government technical data includes 2 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-684-7940 |
| Primary Part Number | 19787-2 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems |
| Status | ACTIVE |
| Cross-Sectional Height | 0.040 INCHES NOMINAL IN |
| Material | RUBBER SILICONE CLASS Q |
| 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 |
|---|---|
| 19787-2 PRIMARY | Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems (USA) |
NSN 5331-00-684-7940 is a O-Ring, manufactured by Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-684-7940 has 1 manufacturer part number on file: 19787-2 (Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems).
Key specifications for 19787-2: Cross-Sectional Height: 0.040 INCHES NOMINAL IN; Material: RUBBER SILICONE CLASS Q. 2 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.