The O-Ring, cataloged under National Stock Number 5331-00-001-8187, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 4 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-001-8187 |
| Primary Part Number | ARP568-239MILP5510 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Outside Diameter | 3.887 INCHES NOMINAL IN |
| Center Hole Diameter | 3.594 INCHES MINIMUM AND 3.624 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| G527-500-001 | Sae International Dba Sae International (USA) |
| ARP568-239MILP5510 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| AS568B-239 | 5/9 Secondary reference U.S. Government activity |
| G527-500-001 | 5/9 Secondary reference U.S. Government activity |
| ARP568-239MILP5510 | 3/9 Design control — primary reference U.S. Government activity |
| G527-500-001 | 5/9 Secondary reference U.S. Government activity |
| AS568B-239 | 5/1 Secondary reference Sae International Dba Sae International |
NSN 5331-00-001-8187 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-001-8187 has 2 manufacturer part numbers on file: G527-500-001 (Sae International Dba Sae International), ARP568-239MILP5510 (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 5331-00-173-3037. Verify interchangeability with system specifications before substitution.
Key specifications for ARP568-239MILP5510: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Outside Diameter: 3.887 INCHES NOMINAL IN; Center Hole Diameter: 3.594 INCHES MINIMUM AND 3.624 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 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.