The Coupling,boss, cataloged under National Stock Number 4730-01-021-9285, 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 Sps Technologies, Llc Dba Airdrome Precision Components. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-021-9285 |
| Primary Part Number | AP310P04 |
| Item Name | Coupling,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sps Technologies, Llc Dba Airdrome Precision Components |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 SWIVEL NUT |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END |
| Nominal Overall Length | 1.257 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Style Designator | RIGID, SHORT CENTER WRENCHING FACILITY |
| Material Document and Classification | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Nominal Thread Size | 0.437 INCHES FIRST END IN |
| Nominal Thread Size | 0.437 INCHES SECOND END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Seat Angle | 37.0 DEGREES SECOND END |
| Surface Treatment | PASSIVATE OVERALL |
| Media for Which Designed | FUEL SINGLE RESPONSE |
| Thread Class | 3A SECOND END A |
| Thread Class | 3B FIRST END |
| Thread Quantity Per Inch | 24 FIRST END |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END |
| Thread Series Designator | UNJS 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 |
|---|---|
| AP310P04 PRIMARY | Sps Technologies, Llc Dba Airdrome Precision Components (USA) |
| R44150P-04 | Parker-Hannifin Corporation Dba Pneutronics Div Stratoflex Product Division (USA) |
| TF310P04 PRIMARY | Smiths Tubular Systems-Laconia, Inc. (USA) |
| ST7M393P4 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 4730PL0890867 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 10108480 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST7M393 | D/9 Drawing number reference only The Boeing Company Div Defense |
| AE16479-4 | 5/9 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| 4730PL1633290 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4730-01-021-9285 is a Coupling,boss, manufactured by Sps Technologies, Llc Dba Airdrome Precision Components, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-021-9285 has 4 manufacturer part numbers on file: AP310P04 (Sps Technologies, Llc Dba Airdrome Precision Components), R44150P-04 (Parker-Hannifin Corporation Dba Pneutronics Div Stratoflex Product Division), TF310P04 (Smiths Tubular Systems-Laconia, Inc.), ST7M393P4 (The Boeing Company Div Defense).
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-041-3728, 4730-01-141-2555, 4730-01-179-2907. Verify interchangeability with system specifications before substitution.
Key specifications for AP310P04: Furnished Items and Quantity: 1 SWIVEL NUT; Connection Style: FLARED (TUBE) SECOND END; Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END; Nominal Overall Length: 1.257 INCHES IN. 21 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.