The O-Ring, cataloged under National Stock Number 5331-01-492-7052, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corp Div O-Ring Division. Government technical data includes 4 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-492-7052 |
| Primary Part Number | L1218 2-037 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Material Document and Classification | 81349,-25988/4 MIL SPEC SINGLE MATERIAL RESPONSE |
| Center Hole Diameter | 2.471 INCHES MINIMUM AND 2.507 INCHES MAXIMUM IN |
| Material | RUBBER |
| 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 |
|---|---|
| L1218 2-037 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| Reference | Meaning |
|---|---|
| AMS-R-25988 | 5/9 Secondary reference U.S. Government activity |
| 2-037 L1007-80 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| MIL-R-25988 | 4/1 Identification reference U.S. Government activity |
| M25988/4-037 | 5/9 Secondary reference U.S. Government activity |
| 2-037L1218-80 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 2-037 L806-80 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
NSN 5331-01-492-7052 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-492-7052 has 1 manufacturer part number on file: L1218 2-037 (Parker-Hannifin Corp Div O-Ring Division).
4 possible matches (shared part number, not a government interchangeability claim): 5331-01-494-4559, 5331-01-494-9943, 5331-01-502-7567. Verify interchangeability with system specifications before substitution.
Key specifications for L1218 2-037: Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Material Document and Classification: 81349,-25988/4 MIL SPEC SINGLE MATERIAL RESPONSE; Center Hole Diameter: 2.471 INCHES MINIMUM AND 2.507 INCHES MAXIMUM IN; Part Name Assigned by Controlling Agency: O-RING. 4 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.