The Coupling,tube, cataloged under National Stock Number 4730-01-121-6398, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Donaldson Company, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-121-6398 |
| Primary Part Number | 1009-1228 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Donaldson Company, Inc. |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | GROOVED (TUBE) ALL ENDS |
| Tubing Wall Nominal Thickness for Which Designed | 0.203 INCHES ALL ENDS IN |
| Nominal Overall Length | 1.030 INCHES IN |
| Connection Type | UNTHREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | GROOVED BOTH ENDS |
| Nominal Outside Diameter Tube Accommodated | 1.875 INCHES ALL ENDS IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY OR ALUMINUM 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 |
|---|---|
| 1009-1228 PRIMARY | Donaldson Company, Inc. (USA) |
| 911-170 ITEM 25 | Donaldson Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 911-170 | D/9 Drawing number reference only Donaldson Company, Inc. |
NSN 4730-01-121-6398 is a Coupling,tube, manufactured by Donaldson Company, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-121-6398 has 2 manufacturer part numbers on file: 1009-1228 (Donaldson Company, Inc.), 911-170 ITEM 25 (Donaldson Company, Inc.).
4 possible matches (shared part number, not a government interchangeability claim): 4330-01-121-6399, 4330-01-127-5171, 4330-01-343-8537. Verify interchangeability with system specifications before substitution.
Key specifications for 1009-1228: Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: GROOVED (TUBE) ALL ENDS; Tubing Wall Nominal Thickness for Which Designed: 0.203 INCHES ALL ENDS IN; Nominal Overall Length: 1.030 INCHES IN. 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.