The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-538-3529, 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 Snap-Tite Hose, Inc.. Government technical data includes 10 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-538-3529 |
| Primary Part Number | S28-1C4-4F |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Snap-Tite Hose, Inc. |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST FLUID END CONNECTION IN |
| Connection Style | PLAIN FIRST FLUID END CONNECTION |
| Connection Type | THREADED INTERNAL PIPE FIRST FLUID END CONNECTION |
| Style Designator | FEMALE COUPLING HALF |
| Operating Pressure | 1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | SELF-SEALING |
| Nominal Thread Size | 0.250 INCHES FIRST FLUID END CONNECTION IN |
| Media for Which Designed | OIL SINGLE RESPONSE |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | NPT FIRST FLUID END CONNECTION |
| 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 |
|---|---|
| S28-1C4-4F PRIMARY | Snap-Tite Hose, Inc. (USA) |
| Reference | Meaning |
|---|---|
| A110052-01 ITEM 4 | 5/9 Secondary reference General Dynamics Advanced Technology Systems Inc |
| A110052-01 ITEM 4 | C/1 Advisory reference — outside the item-of-supply concept General Dynamics Mission Systems, Inc. |
| A110053-01 ITEM 5 | C/1 Advisory reference — outside the item-of-supply concept General Dynamics Mission Systems, Inc. |
| A110053-01 ITEM 5 | 5/9 Secondary reference General Dynamics Advanced Technology Systems Inc |
NSN 4730-01-538-3529 is a Coupling Half,quick Disconnect, manufactured by Snap-Tite Hose, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-538-3529 has 1 manufacturer part number on file: S28-1C4-4F (Snap-Tite Hose, Inc.).
Key specifications for S28-1C4-4F: Nominal Pipe Size Accommodated: 0.250 INCHES FIRST FLUID END CONNECTION IN; Connection Style: PLAIN FIRST FLUID END CONNECTION; Connection Type: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION; Style Designator: FEMALE COUPLING HALF. 10 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.