PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

H-3373 PIECE 007BFlange,pipe

Siemens Energy, Inc. · NSN 4730-01-022-3946 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-022-3946 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-022-3946. Primary manufacturer part number: H-3373 PIECE 007B.
Features
  • Flange,pipe — FSC 4730
  • 15 verified cross-references
  • Primary manufacturer: Siemens Energy, Inc.
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Flange,pipe, cataloged under National Stock Number 4730-01-022-3946, 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 Siemens Energy, Inc.. This item has 15 commercial cross-references from 10 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameFlange,pipe
FSC / FSG4730 — No Item Name Available (FSG 47)
ManufacturersNaval Sea Systems Command (CAGE 53711); Society of Automotive Engineers Inc (CAGE 81343); Siemens Energy, Inc. (CAGE 16712); Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy (CAGE 34646); American Society for Testing and Materials Dba Astm International (CAGE 81346)
Technical Specifications
ParameterValue
NSN4730-01-022-3946
Primary Part NumberH-3373 PIECE 007B
Item NameFlange,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerSiemens Energy, Inc.
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5330-00-212-6432G10540PC57 INTERCHANGEABLE
Retainer,packing
Siemens Energy, Inc.
4730-00-246-5411HC-29N/0221 INTERCHANGEABLE
Flange,pipe
Siemens Energy, Inc.
4730-00-274-3380G10540PC56 INTERCHANGEABLE
Packing Nut
Siemens Energy, Inc.
2825-00-337-0997HC-151D/1113 INTERCHANGEABLE
Cover,valve Body
Siemens Energy, Inc.
2825-00-383-6350HC1804FX1ANDHC215AEX1 INTERCHANGEABLE
Box,packing with Bu
Siemens Energy, Inc.
5315-00-861-6819 INTERCHANGEABLE
Pin,straight,headless
4730-01-012-5660SAE J516 6-6 F250146CA INTERCHANGEABLE
Adapter,straight,tube to Hose
Sae International Dba Sae International
2825-01-182-4519S3202A INTERCHANGEABLE
Packing Box Assembly
Circor Pumps North America Llc
4730-01-182-4521G10322PC48 INTERCHANGEABLE
Plug,nozzle
Siemens Energy, Inc.
2825-01-182-4522HC-1819A INTERCHANGEABLE
Yoke,turbine
Siemens Energy, Inc.
Cross-Reference Index
Part NumberManufacturer
208-5530891 ITEM 131 Naval Sea Systems Command (USA)
6-6 250146CA Society of Automotive Engineers Inc (USA)
H-3373 PIECE 007B PRIMARY Siemens Energy, Inc. (USA)
20 1/2 Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy (USA)
ANSI-B16.50.500 American Society for Testing and Materials Dba Astm International (USA)
20-1/2 ASTMA-10 Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy (USA)
SW-7182-1/2 Flowserve Inc (USA)
MIL-F-18180 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
ANSI-B16.5 .5IN American National Standards Institute Incorporated Dba American National Standards Institute (USA)
M18180/2-01A04 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
B16.5 American National Standards Institute Incorporated Dba American National Standards Institute (USA)
65-1/2 SCHED 80 Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy (USA)
H-3373 Siemens Energy, Inc. (USA)
29510 Crane Co Midwest Fittings Div (USA)
6-6 250146CA Sae International Dba Sae International (USA)
Related Parts
5330-00-212-6432INTERCHANGEABLE
RETAINER,PACKING
G10540PC57
4730-00-246-5411INTERCHANGEABLE
FLANGE,PIPE
HC-29N/0221
4730-00-274-3380INTERCHANGEABLE
PACKING NUT
G10540PC56
2825-00-337-0997INTERCHANGEABLE
COVER,VALVE BODY
HC-151D/1113
2825-00-383-6350INTERCHANGEABLE
BOX,PACKING WITH BU
HC1804FX1ANDHC215AEX1
5315-00-861-6819INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
4730-01-012-5660INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
SAE J516 6-6 F250146CA
2825-01-182-4519INTERCHANGEABLE
PACKING BOX ASSEMBLY
S3202A
4730-01-182-4521INTERCHANGEABLE
PLUG,NOZZLE
G10322PC48
2825-01-182-4522INTERCHANGEABLE
YOKE,TURBINE
HC-1819A
2825-01-182-4523INTERCHANGEABLE
YOKE,TURBINE
G10069PC63
4730-01-183-0666INTERCHANGEABLE
PLUG,NOZZLE
HC-561E/2695

Frequently Asked Questions

What is NSN 4730-01-022-3946?

NSN 4730-01-022-3946 is a Flange,pipe, manufactured by Siemens Energy, Inc., classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-01-022-3946?

NSN 4730-01-022-3946 has 15 cross-referenced part numbers: 208-5530891 ITEM 131 (Naval Sea Systems Command), 6-6 250146CA (Society of Automotive Engineers Inc), H-3373 PIECE 007B (Siemens Energy, Inc.), 20 1/2 (Ati Ladish Llc Dba Ati Wah Chang Div Ati Forged Products - Cudahy), ANSI-B16.50.500 (American Society for Testing and Materials Dba Astm International) and 10 more.

What NSN replaces 4730-01-022-3946?

There are 12 known substitutes for 4730-01-022-3946: 5330-00-212-6432, 4730-00-246-5411, 4730-00-274-3380 and 9 more. Verify interchangeability with system specifications before substitution.

Is NSN 4730-01-022-3946 still in active supply?

NSN 4730-01-022-3946 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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