The Nipple,boss, cataloged under National Stock Number 4730-01-433-1298, 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 Hydro-Fitting Manufacturing Corporation. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-433-1298 |
| Primary Part Number | HF21924-24T |
| Item Name | Nipple,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hydro-Fitting Manufacturing Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS2486 ASSN STD SINGLE TREATMENT RESPONSE OR AMS2486 TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS |
| Nominal Overall Length | 2.469 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Style Designator | FLARELESS W/ BULKHEAD THREADS |
| Material Document and Classification | AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR MIL-T-9047 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 2000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 1.875 INCHES ALL ENDS IN |
| Nominal Thread Size | 1.875 INCHES FIRST END BULKHEAD IN |
| Maximum Operating Temp | 275.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Maximum Operating Temp | -65.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Surface Treatment | PHOSPHATE FLUORIDE OR ANODIZE OVERALL |
| Thread Class | 3A FIRST END BULKHEAD A |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 12 FIRST END BULKHEAD |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | TITANIUM ALLOY UNS R54520 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) FIRST END BULKHEAD |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) 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 |
|---|---|
| HF21924-24T PRIMARY | Hydro-Fitting Manufacturing Corporation (USA) |
| Reference | Meaning |
|---|---|
| 7D0170 | D/9 Drawing number reference only U.S. Government activity |
| 7D0170T24 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-433-1298 is a Nipple,boss, manufactured by Hydro-Fitting Manufacturing Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-433-1298 has 1 manufacturer part number on file: HF21924-24T (Hydro-Fitting Manufacturing Corporation).
Key specifications for HF21924-24T: Surface Treatment Document and Classification: AMS2486 ASSN STD SINGLE TREATMENT RESPONSE OR AMS2486 TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 2.469 INCHES IN; Connection Type: THREADED EXTERNAL BOSS ALL ENDS. 19 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.