PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A5539Retainer,electrical Switch

Westport International, Inc. · NSN 5930-00-678-0875 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-678-0875 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-678-0875. Primary manufacturer part number: A5539.
Features
  • Retainer,electrical Switch — FSC 5930
  • 4 verified cross-references
  • Primary manufacturer: Westport International, Inc.
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Retainer,electrical Switch, cataloged under National Stock Number 5930-00-678-0875, is classified within Federal Supply Class 5930 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Westport International, Inc.. This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5930-00-678-0875
Primary Part NumberA5539
Item NameRetainer,electrical Switch
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerWestport International, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5920-00-938-86607755616P024 INTERCHANGEABLE
Fuseholder,block
Lockheed Martin Corporation Div Rms
4220-01-169-4520550-339 INTERCHANGEABLE
Sleeve,alignment
Kirby Morgan Dive Systems Inc
5930-01-229-3260112FW123-1R1 INTERCHANGEABLE
Switch,proximity
Honeywell International Inc. Dba Honeyweel Sensing & Controls
5365-01-347-4336592-6318227 INTERCHANGEABLE
Spacer,sleeve
Naval Sea Systems Command
5930-01-632-7200A5539 INTERCHANGEABLE
Retainer,electrical Switch
Rolls-Royce Corporation
Cross-Reference Index
Part NumberManufacturer
A5539 Westport International, Inc. (USA)
550039 Aarcorp (USA)
550039 Unison Industries Llc (USA)
9-550039 Westport International, Inc. (USA)
Related Parts
5920-00-938-8660INTERCHANGEABLE
FUSEHOLDER,BLOCK
7755616P024
4220-01-169-4520INTERCHANGEABLE
SLEEVE,ALIGNMENT
550-339
5930-01-229-3260INTERCHANGEABLE
SWITCH,PROXIMITY
112FW123-1R1
5365-01-347-4336INTERCHANGEABLE
SPACER,SLEEVE
592-6318227
5930-01-632-7200INTERCHANGEABLE
RETAINER,ELECTRICAL SWITCH
A5539

Frequently Asked Questions

What is NSN 5930-00-678-0875?

NSN 5930-00-678-0875 is a Retainer,electrical Switch, manufactured by Westport International, Inc., classified under FSC 5930 (No Item Name Available). Status: active.

What are the part numbers for NSN 5930-00-678-0875?

NSN 5930-00-678-0875 has 4 cross-referenced part numbers: A5539 (Westport International, Inc.), 550039 (Aarcorp), 550039 (Unison Industries Llc), 9-550039 (Westport International, Inc.).

What NSN replaces 5930-00-678-0875?

There are 5 known substitutes for 5930-00-678-0875: 5920-00-938-8660, 4220-01-169-4520, 5930-01-229-3260 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A5539?

Key specifications for A5539: Special Features: STAINLESS STEEL,0.750 IN. LG,0.751 IN. H,TWO 0.104 IN. DIA HOLES IN. 1 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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