The O-Ring, cataloged under National Stock Number 5331-01-521-8991, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is B N L Industries 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-521-8991 |
| Primary Part Number | EBV-S2-30-0002-18 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | B N L Industries Inc |
| Status | ACTIVE |
| Cross-Sectional Height | 0.134 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.594 INCHES MINIMUM AND 1.624 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 |
|---|---|
| EBV-S2-30-0002 DET 18 | B N L Industries Inc (USA) |
| EBV-S2-30-0002-18 PRIMARY | B N L Industries Inc (USA) |
NSN 5331-01-521-8991 is a O-Ring, manufactured by B N L Industries Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-521-8991 has 2 manufacturer part numbers on file: EBV-S2-30-0002 DET 18 (B N L Industries Inc), EBV-S2-30-0002-18 (B N L Industries Inc).
Key specifications for EBV-S2-30-0002-18: Cross-Sectional Height: 0.134 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Special Features: O-RING SIZE 2-223; Center Hole Diameter: 1.594 INCHES MINIMUM AND 1.624 INCHES MAXIMUM IN; End Item Identification: ACTUATOR, 3" BALL VALVE. 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.