The Nipple,boss, cataloged under National Stock Number 4730-00-821-7352, 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 Honeywell International, Inc Div Aerospace-Tucson. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-821-7352 |
| Primary Part Number | 512256 |
| Item Name | Nipple,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Honeywell International, Inc Div Aerospace-Tucson |
| Status | ACTIVE |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Connection Style | DOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) FIRST END |
| Nominal Overall Length | 1.165 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Style Designator | PLAIN W/ BULKHEAD THREAD |
| Leg Length | 0.325 INCHES MINIMUM AND 0.335 INCHES MAXIMUM SECOND END IN |
| Leg Length | 0.635 INCHES MINIMUM AND 0.645 INCHES MAXIMUM FIRST END IN |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 3A ALL ENDS A |
| Material | ALUMINUM ALLOY OVERALL |
| 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 |
|---|---|
| 512256 PRIMARY | Honeywell International, Inc Div Aerospace-Tucson (USA) |
| Reference | Meaning |
|---|---|
| 512256 | 5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co |
| 512256 | 5/9 Secondary reference Honeywell International Inc. Div Aerospace - Torrance |
NSN 4730-00-821-7352 is a Nipple,boss, manufactured by Honeywell International, Inc Div Aerospace-Tucson, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-821-7352 has 1 manufacturer part number on file: 512256 (Honeywell International, Inc Div Aerospace-Tucson).
3 possible matches (shared part number, not a government interchangeability claim): 5330-01-121-5377, 5315-01-269-2060, 6150-01-610-9848. Verify interchangeability with system specifications before substitution.
Key specifications for 512256: Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Connection Style: DOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) FIRST END; Nominal Overall Length: 1.165 INCHES IN; Connection Type: THREADED EXTERNAL BOSS FIRST END. 13 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.