The Coupling,boss, cataloged under National Stock Number 4730-00-925-4727, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Hydro-Aire Aerospace Corp. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-925-4727 |
| Primary Part Number | 81839 |
| Item Name | Coupling,boss |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Hydro-Aire Aerospace Corp |
| Status | ACTIVE |
| Thread Class | 3B FIRST END |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Surface Treatment | ANODIZE OVERALL |
| Style Designator | RIGID, THREADED INTERNAL AND EXTERNAL |
| Connection Style | GASKET SEAL (BOSS) FIRST END |
| Media for Which Designed | FLUID SINGLE RESPONSE |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Thread Series Designator | UNF ALL ENDS |
| Material Document and Classification | QQ-A-268,COND T FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Nominal Overall Length | 1.380 INCHES IN |
| Thread Class | 3A SECOND END A |
| Material | ALUMINUM ALLOY OVERALL |
| Connection Type | THREADED INTERNAL BOSS FIRST END |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 81839 PRIMARY | Hydro-Aire Aerospace Corp (USA) |
NSN 4730-00-925-4727 is a Coupling,boss, manufactured by Hydro-Aire Aerospace Corp, classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-00-925-4727 has 1 cross-referenced part number: 81839 (Hydro-Aire Aerospace Corp).
There are 3 known substitutes for 4730-00-925-4727: 2920-00-659-6918, 5133-00-838-5371, 2990-01-103-9333. Verify interchangeability with system specifications before substitution.
Key specifications for 81839: Thread Class: 3B FIRST END; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Special Features: FEMALE END 1.000 IN. OD HEX IN; Surface Treatment: ANODIZE OVERALL. 16 total characteristics are documented in the Federal Logistics Information System.