The Hose,nonmetallic, cataloged under National Stock Number 4720-00-235-4141, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Zenith Fuel Systems Llc. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4720-00-235-4141 |
| Primary Part Number | BK99S3-4 |
| Item Name | Hose,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Zenith Fuel Systems Llc |
| Status | ACTIVE |
| Layer Composition and Location | 1ST LAYER RUBBER IMPREGNATED FABRIC AND 2ND LAYER RUBBER IMPREGNATED FABRIC AND 3RD LAYER RUBBER IMPREGNATED FABRIC AND 4TH LAYER RUBBER IMPREGNATED FABRIC AND OUTER LAYER WRAPPED RUBBER, SYNTHETIC |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 1.375 INCHES NOMINAL IN |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Inside Diameter | 0.711 INCHES MINIMUM AND 0.758 INCHES MAXIMUM IN |
| Inside Surface Condition | SMOOTH |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Hydrostatic Test Pressure | 1000.0 POUNDS PER SQUARE INCH SINGLE RESPONSE LBS |
| Material | RUBBER SYNTHETIC TUBE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4720-00-235-4141 is a Hose,nonmetallic, manufactured by Zenith Fuel Systems Llc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-00-235-4141 has 2 manufacturer part numbers on file: BK99S3-4 (Zenith Fuel Systems Llc), 97954 (Zenith Fuel Systems Llc).
1 possible match (shared part number, not a government interchangeability claim): 5940-01-630-9090. Verify interchangeability with system specifications before substitution.
Key specifications for BK99S3-4: Layer Composition and Location: 1ST LAYER RUBBER IMPREGNATED FABRIC AND 2ND LAYER RUBBER IMPREGNATED FABRIC AND 3RD LAYER RUBBER IMPREGNATED FABRIC AND 4TH LAYER RUBBER IMPREGNATED FABRIC AND OUTER LAYER WRAPPED RUBBER, SYNTHETIC; Cross-Sectional Shape Style: ROUND; Outside Diameter: 1.375 INCHES NOMINAL IN; Operating Pressure: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 9 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.