PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A-A-2956Heater,water,electric

Federal Commercial Item Description Promulgated by General Services Administration Washington DC · NSN 4520-00-033-4287 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-00-033-4287 — this item is cataloged by the U.S. Government under National Stock Number 4520-00-033-4287. Primary manufacturer part number: A-A-2956.
Features
  • Heater,water,electric — FSC 4520
  • Overall Diameter: 24.0 INCHES MAXIMUM IN
  • Insulated Feature: INCLUDED
  • Water Inlet Connection Thread Size and Series/type Designator: 3/4-14 NPT
  • Heating Element Wattage Rating: 4500.000 LOWER AND 4500.000 UPPER
  • Heating Element Type: DOUBLE
  • Capacity: 40.0 GALLONS TANK
  • Thermostatic Switch: INCLUDED
Applications
  • Applications requiring Steel construction
General Description

The Heater,water,electric, cataloged under National Stock Number 4520-00-033-4287, 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 Federal Commercial Item Description Promulgated by General Services Administration Washington DC. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4520-00-033-4287
Primary Part NumberA-A-2956
Item NameHeater,water,electric
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerFederal Commercial Item Description Promulgated by General Services Administration Washington DC
StatusACTIVE
Overall Diameter24.0 INCHES MAXIMUM IN
Insulated FeatureINCLUDED
Water Inlet Connection Thread Size and Series/type Designator3/4-14 NPT
Heating Element Wattage Rating4500.000 LOWER AND 4500.000 UPPER
Heating Element TypeDOUBLE
Capacity40.0 GALLONS TANK
Thermostatic SwitchINCLUDED
Switch TypeSINGLE THROW
Water Outlet Connection Thread Size and Series/type Designator3/4-14 NPT
Frequency in Hertz60.0
MaterialSTEEL
Environmental Attribute CodeWATER HEATERS, ELECTRIC RESISTANCE, RESIDENTIAL - FEMP-HEATING AND COOLING - ENERGY EFFICIENT PRODUCTS
PhaseSINGLE
Operating Pressure150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Surface TreatmentGLASS FIBER AND PORCELAIN INSIDE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4520-00-033-4283 INTERCHANGEABLE
Heater,water,electric
4520-00-033-4284 INTERCHANGEABLE
Heater,water,electric
4520-00-033-4286 INTERCHANGEABLE
Heater,water,electric
4520-00-101-39653570K33 INTERCHANGEABLE
Heater,water,electric
Mcmaster-Carr Supply Co
4520-00-101-3967 INTERCHANGEABLE
Heater,water,electric
4520-00-143-9399 INTERCHANGEABLE
Heater,water,electric
4520-00-143-9400 INTERCHANGEABLE
Heater,water,electric
4520-00-143-9548 INTERCHANGEABLE
Heater,water,gas
4520-00-151-675381VP20S INTERCHANGEABLE
Heater,water,electric
Rheem Mfg Co
4520-00-585-2986 INTERCHANGEABLE
Heater,water,gas
Cross-Reference Index
Part NumberManufacturer
A-A-2956 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
W-H-196 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
AA29564T2S40 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
UL 174 Underwriters Laboratories Inc (USA)
Related Parts
4520-00-033-4283INTERCHANGEABLE
HEATER,WATER,ELECTRIC
4520-00-033-4284INTERCHANGEABLE
HEATER,WATER,ELECTRIC
4520-00-033-4286INTERCHANGEABLE
HEATER,WATER,ELECTRIC
4520-00-101-3965INTERCHANGEABLE
HEATER,WATER,ELECTRIC
3570K33
4520-00-101-3967INTERCHANGEABLE
HEATER,WATER,ELECTRIC
4520-00-143-9399INTERCHANGEABLE
HEATER,WATER,ELECTRIC
4520-00-143-9400INTERCHANGEABLE
HEATER,WATER,ELECTRIC
4520-00-143-9548INTERCHANGEABLE
HEATER,WATER,GAS
4520-00-151-6753INTERCHANGEABLE
HEATER,WATER,ELECTRIC
81VP20S
4520-00-585-2986INTERCHANGEABLE
HEATER,WATER,GAS
4520-00-585-2989INTERCHANGEABLE
HEATER,WATER,ELECTRIC
4520-00-585-2989
4520-00-585-2990INTERCHANGEABLE
HEATER,WATER,ELECTRIC

Frequently Asked Questions

What is NSN 4520-00-033-4287?

NSN 4520-00-033-4287 is a Heater,water,electric, manufactured by Federal Commercial Item Description Promulgated by General Services Administration Washington DC, classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-00-033-4287?

NSN 4520-00-033-4287 has 4 cross-referenced part numbers: A-A-2956 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), W-H-196 (Federal Specifications Promulgated by General Services Administration Washington DC), AA29564T2S40 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), UL 174 (Underwriters Laboratories Inc).

What NSN replaces 4520-00-033-4287?

There are 12 known substitutes for 4520-00-033-4287: 4520-00-033-4283, 4520-00-033-4284, 4520-00-033-4286 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A-A-2956?

Key specifications for A-A-2956: Overall Diameter: 24.0 INCHES MAXIMUM IN; Insulated Feature: INCLUDED; Water Inlet Connection Thread Size and Series/type Designator: 3/4-14 NPT; Heating Element Wattage Rating: 4500.000 LOWER AND 4500.000 UPPER. 17 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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