PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

H556CBushing,sleeve

Siemens Energy, Inc. · NSN 3120-00-126-4517 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-126-4517 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-126-4517. Primary manufacturer part number: H556C.
Features
  • Bushing,sleeve — FSC 3120
  • 3 verified cross-references
  • Primary manufacturer: Siemens Energy, Inc.
Applications
  • Industrial machinery bearing replacement
  • Motor and pump shaft assemblies
  • HVAC blower and fan assemblies
General Description

The Bushing,sleeve, cataloged under National Stock Number 3120-00-126-4517, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Siemens Energy, Inc.. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameBushing,sleeve
FSC / FSG3120 — No Item Name Available (FSG 31)
ManufacturersSiemens Energy, Inc. (CAGE 16712); Rps-Fl, Inc. Dba Rps Inc (CAGE 54402); Marine Diesel, Inc. Dba Marine Diesel (CAGE 59155)
Technical Specifications
ParameterValue
NSN3120-00-126-4517
Primary Part NumberH556C
Item NameBushing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerSiemens Energy, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-154-48397B8320 INTERCHANGEABLE
Seal,plain Encased
Caterpillar Inc Div Caterpillar Defense
5331-00-171-5371KS1321 INTERCHANGEABLE
O-Ring
Minor Rubber Co Inc
5331-00-291-327399-4113-229 INTERCHANGEABLE
O-Ring
Hamilton Sundstrand Corporation
5360-00-449-2693 INTERCHANGEABLE
Spring,helical,compression
5950-00-482-370511229 INTERCHANGEABLE
Reactor
Freed Transformer Co
5136-00-580-7356 INTERCHANGEABLE
Tap,thread Cutting
2835-00-753-1442379854 INTERCHANGEABLE
Filter Element
Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
6105-00-830-992011229 INTERCHANGEABLE
Motor,alternating Current
Elbitamerica, Inc.
5940-00-920-7114 INTERCHANGEABLE
Cover,terminal Board
2915-01-035-112411229 INTERCHANGEABLE
Driver
Parker Hannifin Corp Dba Pneutronics
Cross-Reference Index
Part NumberManufacturer
H556C PRIMARY Siemens Energy, Inc. (USA)
11229 Rps-Fl, Inc. Dba Rps Inc (USA)
126-4517 Marine Diesel, Inc. Dba Marine Diesel (USA)
Related Parts
5330-00-154-4839INTERCHANGEABLE
SEAL,PLAIN ENCASED
7B8320
5331-00-171-5371INTERCHANGEABLE
O-RING
KS1321
5331-00-291-3273INTERCHANGEABLE
O-RING
99-4113-229
5360-00-449-2693INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5950-00-482-3705INTERCHANGEABLE
REACTOR
11229
5136-00-580-7356INTERCHANGEABLE
TAP,THREAD CUTTING
2835-00-753-1442INTERCHANGEABLE
FILTER ELEMENT
379854
6105-00-830-9920INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
11229
5940-00-920-7114INTERCHANGEABLE
COVER,TERMINAL BOARD
2915-01-035-1124INTERCHANGEABLE
DRIVER
11229
5331-01-300-1205INTERCHANGEABLE
O-RING
6515-01-426-4257INTERCHANGEABLE
FORCEPS,ARTHROSCOPIC
1.1229

Frequently Asked Questions

What is NSN 3120-00-126-4517?

NSN 3120-00-126-4517 is a Bushing,sleeve, manufactured by Siemens Energy, Inc., classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-126-4517?

NSN 3120-00-126-4517 has 3 cross-referenced part numbers: H556C (Siemens Energy, Inc.), 11229 (Rps-Fl, Inc. Dba Rps Inc), 126-4517 (Marine Diesel, Inc. Dba Marine Diesel).

What NSN replaces 3120-00-126-4517?

There are 12 known substitutes for 3120-00-126-4517: 5330-00-154-4839, 5331-00-171-5371, 5331-00-291-3273 and 9 more. Verify interchangeability with system specifications before substitution.

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