NSN 5999-01-451-9729 · NIIN 014519729 · Part number 18-398-789-502
Siemens Energy and Automation Inc Ite Circuit Protection Div · FSC 5999 — Miscellaneous Electrical and Electronic Components · FSG 59 — Electrical and Electronic Equipment Components · CAGE 66842
Government record, cited
NSN 5999-01-451-9729 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-451-9729. Manufacturer of record part number: 18-398-789-502.
Also searched as5999-01-451-9729 ·
5999014519729 ·
NIIN 014519729 ·
01-451-9729 ·
FSC 5999 Miscellaneous Electrical and Electronic Components · CAGE 66842 · 18-398-789-502
Manufacturer of record: Siemens Energy and Automation Inc Ite Circuit Protection Div
Identification
NSN: 5999-01-451-9729
NIIN: 014519729
FSC: 5999 — Miscellaneous Electrical and Electronic Components
FSG: 59 — Electrical and Electronic Equipment Components
Primary part number: 18-398-789-502
Manufacturer: Siemens Energy and Automation Inc Ite Circuit Protection Div
General Description
The Contact Assembly,electrical, cataloged under National Stock Number 5999-01-451-9729, is classified within Federal Supply Class 5999 (Miscellaneous Electrical and Electronic Components) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Siemens Energy and Automation Inc Ite Circuit Protection Div. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active. Unit of issue: EA.
Technical Specifications
Parameter
Value
NSN
5999-01-451-9729
Primary Part Number
18-398-789-502
Item Name
Contact Assembly,electrical
FSC / FSG
5999 / 59 — Miscellaneous Electrical and Electronic Components
Manufacturer
Siemens Energy and Automation Inc Ite Circuit Protection Div
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Siemens Energy and Automation Inc Ite Circuit Protection Div (USA)
No interchangeability data on file.
Other items in FSC 5999 — Miscellaneous Electrical and Electronic Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5999-00-001-1345
5999-00-001-1345 · Item name not on file
5999-00-001-1346
5999-00-001-1346 · Item name not on file
5999-00-001-1348
5999-00-001-1348 · Item name not on file
5999-00-001-1349
5999-00-001-1349 · Item name not on file
5999-00-001-1355
5999-00-001-1355 · Item name not on file
5999-00-001-1623
5999-00-001-1623 · Item name not on file
5999-00-001-2537
5999-00-001-2537 · Item name not on file
5999-00-001-2539
5999-00-001-2539 · Item name not on file
Frequently Asked Questions
What is NSN 5999-01-451-9729?
NSN 5999-01-451-9729 is a Contact Assembly,electrical, manufactured by Siemens Energy and Automation Inc Ite Circuit Protection Div, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
What part numbers are listed for NSN 5999-01-451-9729?
NSN 5999-01-451-9729 has 1 manufacturer part number on file: 18-398-789-502 (Siemens Energy and Automation Inc Ite Circuit Protection Div).
What are the specifications of 18-398-789-502?
Key specifications for 18-398-789-502: End Item Identification: RL4000E0 BREAKER. 0 specifications are documented in the U.S. Government catalog.
Is NSN 5999-01-451-9729 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). 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.