PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12-258-4Contact Assembly,electrical

Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated · NSN 5999-01-014-0614 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-014-0614 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-014-0614. Primary manufacturer part number: 12-258-4.
Features
  • Contact Assembly,electrical — FSC 5999
  • Structural Design: NONPILE-UP
  • Structural Design: NONPILE-UP
  • 2 verified cross-references
  • Primary manufacturer: Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Contact Assembly,electrical, cataloged under National Stock Number 5999-01-014-0614, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5999-01-014-0614
Primary Part Number12-258-4
Item NameContact Assembly,electrical
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerAsco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated
StatusACTIVE
Structural DesignNONPILE-UP
Structural DesignNONPILE-UP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4820-01-434-5345122584 INTERCHANGEABLE
Guide,valve Stem
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
12-258-4 PRIMARY Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated (USA)
12-258-4 Automatic Switch Company Dba Asco (USA)
Related Parts
4820-01-434-5345INTERCHANGEABLE
GUIDE,VALVE STEM
122584

Frequently Asked Questions

What is NSN 5999-01-014-0614?

NSN 5999-01-014-0614 is a Contact Assembly,electrical, manufactured by Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-014-0614?

NSN 5999-01-014-0614 has 2 cross-referenced part numbers: 12-258-4 (Asco Power Services Inc Dba Asco Emergency Power Maintenance Incorporated), 12-258-4 (Automatic Switch Company Dba Asco).

What NSN replaces 5999-01-014-0614?

There is 1 known substitute for 5999-01-014-0614: 4820-01-434-5345. Verify interchangeability with system specifications before substitution.

What are the specifications of 12-258-4?

Key specifications for 12-258-4: Structural Design: NONPILE-UP; Structural Design: NONPILE-UP. 2 total characteristics are documented in the Federal Logistics Information System.

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