The O-Ring, cataloged under National Stock Number 5331-01-509-1881, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Wellman Dynamics Machining and Assembly, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-509-1881 |
| Primary Part Number | 3644516 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Wellman Dynamics Machining and Assembly, Inc. |
| Status | ACTIVE |
| Center Hole Diameter | 1.171 INCHES NOMINAL IN |
| 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 |
|---|---|
| 3644516 PRIMARY | Wellman Dynamics Machining and Assembly, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3644516 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5331-01-509-1881 is a O-Ring, manufactured by Wellman Dynamics Machining and Assembly, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-509-1881 has 1 manufacturer part number on file: 3644516 (Wellman Dynamics Machining and Assembly, Inc.).
Key specifications for 3644516: Center Hole Diameter: 1.171 INCHES NOMINAL IN; End Item Identification: CARRIER BRIDGE LAUNCHING, NSN 5420-01-430-5403; Material: RUBBER FLUOROCARBON CLASS FPM. 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.