NSN 4730-01-643-9427 · NIIN 016439427 · Part number MS21916K10-8
Boeing Distribution Services X, Inc. · FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings · CAGE 2N935
Government record, cited
NSN 4730-01-643-9427 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-643-9427. Manufacturer of record part number: MS21916K10-8.
Also searched as4730-01-643-9427 ·
4730016439427 ·
NIIN 016439427 ·
01-643-9427 ·
FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · CAGE 2N935 · MS21916K10-8
4730-01-643-9427 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Features
Reducer,boss — FSC 4730
Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS
Nominal Overall Length: 1.531 INCHES IN
Connection Type: THREADED EXTERNAL BOSS ALL ENDS
Style Designator: THREADED
Nominal Thread Size: 0.750 INCHES SECOND END IN
Nominal Thread Size: 0.875 INCHES FIRST END IN
Specification/standard Data: 96906-MS21916 GOVERNMENT STANDARD AND 81343-SAE-AS21916 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Identification
NSN: 4730-01-643-9427
NIIN: 016439427
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
FSG: 47 — Pipe, Tubing, Hose, and Fittings
Primary part number: MS21916K10-8
Manufacturer: Boeing Distribution Services X, Inc.
General Description
The Reducer,boss, cataloged under National Stock Number 4730-01-643-9427, 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 Boeing Distribution Services X, Inc.. Government technical data includes 11 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. Current acquisition status: Active.
Other items in FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895
4730-00-000-1895 · Item name not on file
4730-00-000-4289
4730-00-000-4289 · Item name not on file
4730-00-000-4445
4730-00-000-4445 · Item name not on file
4730-00-000-8373
4730-00-000-8373 · Item name not on file
4730-00-000-8897
4730-00-000-8897 · Item name not on file
4730-00-001-0007
4730-00-001-0007 · Item name not on file
4730-00-001-0008
COUPLING,TUBE
4730-00-001-0008
COUPLING,TUBE
Frequently Asked Questions
What is NSN 4730-01-643-9427?
NSN 4730-01-643-9427 is a Reducer,boss, manufactured by Boeing Distribution Services X, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
What part numbers are listed for NSN 4730-01-643-9427?
NSN 4730-01-643-9427 has 1 manufacturer part number on file: MS21916K10-8 (Boeing Distribution Services X, Inc.).
What are the specifications of MS21916K10-8?
Key specifications for MS21916K10-8: Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 1.531 INCHES IN; Connection Type: THREADED EXTERNAL BOSS ALL ENDS; Style Designator: THREADED. 11 specifications are documented in the U.S. Government catalog.
Is NSN 4730-01-643-9427 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.