The Tubing,nonmetallic, cataloged under National Stock Number 4720-01-581-6636, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Nd Defense Llc. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-581-6636 |
| Primary Part Number | 3520529C2 |
| Item Name | Tubing,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Nd Defense Llc |
| Status | ACTIVE |
| Supplementary Features | RESISTANT TO ATTACK BY GASOLINE, DIESEL FUEL, METHYL ALCOHOL, AND ZINC CHLORIDE; NOT TO BE USED IN AREA SUBJECT TO ATTACK BY BATTERY ACID |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 0.250 INCHES NOMINAL IN |
| Features Provided | FLEXIBLE |
| Inside Diameter | 0.170 INCHES NOMINAL IN |
| Inside Surface Condition | SMOOTH |
| Burst Test Pressure | 1200.0 POUNDS PER SQUARE INCH SINGLE RESPONSE LBS |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| 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 |
|---|---|
| 3520529C2 | Nd Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 4245-041E6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4720-01-581-6636 is a Tubing,nonmetallic, manufactured by Nd Defense Llc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-581-6636 has 1 manufacturer part number on file: 3520529C2 (Nd Defense Llc).
Key specifications for 3520529C2: Supplementary Features: RESISTANT TO ATTACK BY GASOLINE, DIESEL FUEL, METHYL ALCOHOL, AND ZINC CHLORIDE; NOT TO BE USED IN AREA SUBJECT TO ATTACK BY BATTERY ACID; Cross-Sectional Shape Style: ROUND; Outside Diameter: 0.250 INCHES NOMINAL IN; Features Provided: FLEXIBLE. 8 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.