PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

I-78AIncreaser,heating-Air Conditioni

Speko Products Inc · NSN 4520-01-157-3592 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-01-157-3592 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-157-3592. Primary manufacturer part number: I-78A.
Features
  • Increaser,heating-Air Conditioni — FSC 4520
  • General Characteristics Item Description: FIRST END-8.000 IN.OD;SECOND END-7.000 IN.OD,CRIMPED IN
  • 2 verified cross-references
  • Primary manufacturer: Speko Products Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Increaser,heating-Air Conditioni, cataloged under National Stock Number 4520-01-157-3592, is classified within Federal Supply Class 4520 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Speko Products Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4520-01-157-3592
Primary Part NumberI-78A
Item NameIncreaser,heating-Air Conditioni
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerSpeko Products Inc
StatusACTIVE
General Characteristics Item DescriptionFIRST END-8.000 IN.OD;SECOND END-7.000 IN.OD,CRIMPED IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5340-00-019-2938178A INTERCHANGEABLE
Padlock
Eastern Co the Ccl Security Products
5210-00-271-9944178A INTERCHANGEABLE
Gage,fillet and Radius
L.s. Starrett Company (the) Div Tool Division
5360-00-292-2647178A INTERCHANGEABLE
Spring,helical,compression
Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions
5950-00-646-4326 INTERCHANGEABLE
Coil,telephone
6625-01-312-1935178A INTERCHANGEABLE
Wave Form Synthesizer
Fluke Corp
4720-01-528-8798178A INTERCHANGEABLE
Hose,nonmetallic
Associate Engineering Corp
Cross-Reference Index
Part NumberManufacturer
I-78A PRIMARY Speko Products Inc (USA)
1-78A Speko Products Inc (USA)
Related Parts
5340-00-019-2938INTERCHANGEABLE
PADLOCK
178A
5210-00-271-9944INTERCHANGEABLE
GAGE,FILLET AND RADIUS
178A
5360-00-292-2647INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
178A
5950-00-646-4326INTERCHANGEABLE
COIL,TELEPHONE
6625-01-312-1935INTERCHANGEABLE
WAVE FORM SYNTHESIZER
178A
4720-01-528-8798INTERCHANGEABLE
HOSE,NONMETALLIC
178A

Frequently Asked Questions

What is NSN 4520-01-157-3592?

NSN 4520-01-157-3592 is a Increaser,heating-Air Conditioni, manufactured by Speko Products Inc, classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-01-157-3592?

NSN 4520-01-157-3592 has 2 cross-referenced part numbers: I-78A (Speko Products Inc), 1-78A (Speko Products Inc).

What NSN replaces 4520-01-157-3592?

There are 6 known substitutes for 4520-01-157-3592: 5340-00-019-2938, 5210-00-271-9944, 5360-00-292-2647 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of I-78A?

Key specifications for I-78A: General Characteristics Item Description: FIRST END-8.000 IN.OD;SECOND END-7.000 IN.OD,CRIMPED 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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