The Tubing Assembly,nonmetallic, cataloged under National Stock Number 4720-01-187-2065, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is King Nutronics Corporation Dba King Nutronics. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4720-01-187-2065 |
| Primary Part Number | 3657-42-1 |
| Item Name | Tubing Assembly,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | King Nutronics Corporation Dba King Nutronics |
| Status | ACTIVE |
| Measuring Method and Length | 16.000 INCHES NOMINAL OVERALL IN |
| Minimum Inside Bending Radius | 1.000 INCHES IN |
| Connection Style | SWIVEL NUT WITH LOOSE OR INTEGRAL CLINCH SLEEVE FIRST END |
| End Connection Design | STRAIGHT FIRST END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 0.250 INCHES NOMINAL IN |
| Operating Pressure | 160.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Features Provided | IDENTICAL ENDS |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Seat Angle | 20.0 DEGREES FIRST END |
| Inside Diameter | 0.170 INCHES NOMINAL IN |
| Inside Surface Condition | SMOOTH |
| Thread Class | 3B FIRST END |
| Burst Test Pressure | 250.0 POUNDS PER SQUARE INCH LBS |
| Material | PLASTIC, POLYETHYLENE (PP) TUBE |
| Thread Series Designator | UNF FIRST END |
| 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 |
|---|---|
| 3657-42-1 PRIMARY | King Nutronics Corporation Dba King Nutronics (USA) |
| Reference | Meaning |
|---|---|
| 3657-42 | D/9 Drawing number reference only King Nutronics Corporation Dba King Nutronics |
NSN 4720-01-187-2065 is a Tubing Assembly,nonmetallic, manufactured by King Nutronics Corporation Dba King Nutronics, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-187-2065 has 1 manufacturer part number on file: 3657-42-1 (King Nutronics Corporation Dba King Nutronics).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-723-5721. Verify interchangeability with system specifications before substitution.
Key specifications for 3657-42-1: Measuring Method and Length: 16.000 INCHES NOMINAL OVERALL IN; Minimum Inside Bending Radius: 1.000 INCHES IN; Connection Style: SWIVEL NUT WITH LOOSE OR INTEGRAL CLINCH SLEEVE FIRST END; End Connection Design: STRAIGHT FIRST END. 18 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.