PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A2501Light-Switch Assembly

Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc · NSN 5999-01-381-0303 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-381-0303 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-381-0303. Primary manufacturer part number: A2501.
Features
  • Light-Switch Assembly — FSC 5999
  • 2 verified cross-references
  • Primary manufacturer: Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Light-Switch Assembly, cataloged under National Stock Number 5999-01-381-0303, 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 Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameLight-Switch Assembly
FSC / FSG5999 — No Item Name Available (FSG 59)
ManufacturersAiken Advanced Systems Inc a Div of Amstar Technical Products Inc an Affil of Amstar Corp (CAGE 60590); Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc (CAGE 51283)
Successor NSN5999-00-985-0870 — Handle
Technical Specifications
ParameterValue
NSN5999-01-381-0303
Primary Part NumberA2501
Item NameLight-Switch Assembly
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerTechnical Services Laboratory, Inc. Dba Technical Services Laboratory Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5999-00-985-08700N097118-1 SUCCESSOR
Handle
National Security Agency
3940-00-043-0132A250-1 INTERCHANGEABLE
Block,tackle
Marathonnorco Aerospace, Inc.
3120-00-287-7683AA2501 INTERCHANGEABLE
Bearing,sleeve
Beemer Precision Inc
5330-00-454-9277 INTERCHANGEABLE
Gasket Set
4010-00-769-8432A2501 INTERCHANGEABLE
Chain,weldless
Am General Llc
7021-01-075-7497118-000397 INTERCHANGEABLE
Arm,bottom Up and Down Assembly
Data General Corporation
7690-01-500-0915A-2501 INTERCHANGEABLE
Decal
Textron Aviation Inc
Cross-Reference Index
Part NumberManufacturer
A2501 Aiken Advanced Systems Inc a Div of Amstar Technical Products Inc an Affil of Amstar Corp (USA)
A2501 PRIMARY Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc (USA)
Related Parts
5999-00-985-0870SUCCESSOR
HANDLE
0N097118-1
3940-00-043-0132INTERCHANGEABLE
BLOCK,TACKLE
A250-1
3120-00-287-7683INTERCHANGEABLE
BEARING,SLEEVE
AA2501
5330-00-454-9277INTERCHANGEABLE
GASKET SET
4010-00-769-8432INTERCHANGEABLE
CHAIN,WELDLESS
A2501
7021-01-075-7497INTERCHANGEABLE
ARM,BOTTOM UP AND DOWN ASSEMBLY
118-000397
7690-01-500-0915INTERCHANGEABLE
DECAL
A-2501

Frequently Asked Questions

What is NSN 5999-01-381-0303?

NSN 5999-01-381-0303 is a Light-Switch Assembly, manufactured by Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-381-0303?

NSN 5999-01-381-0303 has 2 cross-referenced part numbers: A2501 (Aiken Advanced Systems Inc a Div of Amstar Technical Products Inc an Affil of Amstar Corp), A2501 (Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc).

What NSN replaces 5999-01-381-0303?

There are 7 known substitutes for 5999-01-381-0303: 5999-00-985-0870, 3940-00-043-0132, 3120-00-287-7683 and 4 more. Verify interchangeability with system specifications before substitution.

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