PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NT581Fixture,leak Test

Simmonds Precision Products Inc · NSN 4920-01-177-5123 · FSC 4920 · No Item Name Available
Verified by PartsTable
NSN 4920-01-177-5123 — this item is cataloged by the U.S. Government under National Stock Number 4920-01-177-5123. Primary manufacturer part number: NT581.
Features
  • Fixture,leak Test — FSC 4920
  • 1 verified cross-reference
  • Primary manufacturer: Simmonds Precision Products Inc
Applications
  • Maintenance depot operations
  • Field repair and servicing
  • Vehicle maintenance facilities
General Description

The Fixture,leak Test, cataloged under National Stock Number 4920-01-177-5123, is classified within Federal Supply Class 4920 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Simmonds Precision Products Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameFixture,leak Test
FSC / FSG4920 — No Item Name Available (FSG 49)
ManufacturersSimmonds Precision Products Inc (CAGE 12511)
Technical Specifications
ParameterValue
NSN4920-01-177-5123
Primary Part NumberNT581
Item NameFixture,leak Test
FSC / FSG4920 / 49 — No Item Name Available
ManufacturerSimmonds Precision Products Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5950-00-221-2944304130 INTERCHANGEABLE
Transformer,audio Frequency
Naval Ship Systems Command
Cross-Reference Index
Part NumberManufacturer
NT581 PRIMARY Simmonds Precision Products Inc (USA)
Related Parts
5950-00-221-2944INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
304130

Frequently Asked Questions

What is NSN 4920-01-177-5123?

NSN 4920-01-177-5123 is a Fixture,leak Test, manufactured by Simmonds Precision Products Inc, classified under FSC 4920 (No Item Name Available). Status: active.

What are the part numbers for NSN 4920-01-177-5123?

NSN 4920-01-177-5123 has 1 cross-referenced part number: NT581 (Simmonds Precision Products Inc).

What NSN replaces 4920-01-177-5123?

There is 1 known substitute for 4920-01-177-5123: 5950-00-221-2944. Verify interchangeability with system specifications before substitution.

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