The O-Ring, cataloged under National Stock Number 5331-00-138-6287, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Elastomerics Engineering Inc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-138-6287 |
| Primary Part Number | K618730-11 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Elastomerics Engineering Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Center Hole Diameter | 3.730 INCHES NOMINAL IN |
| Material | RUBBER CHLOROPRENE CLASS CR |
| 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 |
|---|---|
| K618730-11 | Elastomerics Engineering Inc (USA) |
| K618730-11 | Kirkhill Inc Div Kirkhill Inc, Haskon Division (USA) |
| Reference | Meaning |
|---|---|
| K618730-11 | 5/9 Secondary reference Kirkhill Ta Haskon Div |
| K618730-11 | 3/2 Design control — primary reference U.S. Government activity |
| K618730-11 | 5/1 Secondary reference Meggitt Oregon Inc Dba Meggitt Oregon Inc Div Meggitt Polymers & Composites |
NSN 5331-00-138-6287 is a O-Ring, manufactured by Elastomerics Engineering Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-138-6287 has 2 manufacturer part numbers on file: K618730-11 (Elastomerics Engineering Inc), K618730-11 (Kirkhill Inc Div Kirkhill Inc, Haskon Division).
Key specifications for K618730-11: Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Center Hole Diameter: 3.730 INCHES NOMINAL IN; End Item Identification: W/S: HELICOPTER, SEASPRITE H-2; Material: RUBBER CHLOROPRENE CLASS CR. 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.