The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-243-3540, 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 Tuthill Corp Hansen Coupling Div. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-243-3540 |
| Primary Part Number | 4-K-10 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Tuthill Corp Hansen Coupling Div |
| Status | ACTIVE |
| Connection Style | BOSS GASKET SEAL ALL ENDS |
| Connection Type | THREADED INTERNAL BOSS FIRST FLUID END CONNECTION |
| Style Designator | MALE COUPLING HALF |
| Leg Length | 0.870 INCHES NOMINAL IN |
| Nominal Thread Size | 0.875 INCHES ALL ENDS IN |
| Thread Class | 2B ALL ENDS |
| Material | STEEL BODY |
| Quick Disconnect Method | PUSH-PULL ALL ENDS |
| Thread Series Designator | UNF ALL ENDS |
| 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 |
|---|---|
| 12357237-2 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 4-K-10 PRIMARY | Tuthill Corp Hansen Coupling Div (USA) |
| 4-K-10 PRIMARY | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
| K4S10 PRIMARY | Foster Manufacturing Co, Inc. Dba Foster Manufacturing Co (USA) |
| H4-63-T10 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division (USA) |
| Reference | Meaning |
|---|---|
| 12357237 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
| 3270362 | 5/9 Secondary reference Oshkosh Defense Llc |
| 3270362 | 5/9 Secondary reference Oshkosh Corp |
| H4-63-T10 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-243-3540 is a Coupling Half,quick Disconnect, manufactured by Tuthill Corp Hansen Coupling Div, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-243-3540 has 5 manufacturer part numbers on file: 12357237-2 (U S Army Tank Automotive Command Amsta-Im-Mm), 4-K-10 (Tuthill Corp Hansen Coupling Div), 4-K-10 (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution), K4S10 (Foster Manufacturing Co, Inc. Dba Foster Manufacturing Co), H4-63-T10 (Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupling Division).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-245-7604, 4730-01-245-7605. Verify interchangeability with system specifications before substitution.
Key specifications for 4-K-10: Connection Style: BOSS GASKET SEAL ALL ENDS; Connection Type: THREADED INTERNAL BOSS FIRST FLUID END CONNECTION; Style Designator: MALE COUPLING HALF; Overall Length: 1.938 INCHES NOMINAL 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.