PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

17746Heater,water,electric

The Electric Heater Co Dba Hubbell Electric Heater Co. · NSN 4520-01-317-5438 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-01-317-5438 — this item is cataloged by the U.S. Government under National Stock Number 4520-01-317-5438. Primary manufacturer part number: 17746.
Features
  • Heater,water,electric — FSC 4520
  • Capacity: 306.0 GALLONS TANK
  • Water Inlet Connection Thread Size and Series/type Designator: 1-11-1/2 NPT
  • Insulated Feature: NOT INCLUDED
  • Operating Pressure: 110.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
  • Thermostatic Switch: INCLUDED
  • Furnished Items and Quantity: RELIEF VALVE 1
  • Water Outlet Connection Thread Size and Series/type Designator: 1-11-1/2 NPT
Applications
  • Applications requiring Copper Alloy construction
General Description

The Heater,water,electric, cataloged under National Stock Number 4520-01-317-5438, 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 The Electric Heater Co Dba Hubbell Electric Heater Co.. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4520-01-317-5438
Primary Part Number17746
Item NameHeater,water,electric
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerThe Electric Heater Co Dba Hubbell Electric Heater Co.
StatusACTIVE
Capacity306.0 GALLONS TANK
Water Inlet Connection Thread Size and Series/type Designator1-11-1/2 NPT
Insulated FeatureNOT INCLUDED
Operating Pressure110.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Thermostatic SwitchINCLUDED
Furnished Items and QuantityRELIEF VALVE 1
Water Outlet Connection Thread Size and Series/type Designator1-11-1/2 NPT
Attachment DeviceINCLUDED
Water Outlet Connection Quantity1
MaterialCOPPER ALLOY
Frequency in Hertz60.0
Specification/standard Data81349-MIL-H-965D AMEND2 GOVERNMENT SPECIFICATION
Overall Diameter36.000 INCHES NOMINAL IN
Water Inlet Connection Quantity1
PhaseTHREE
Heating Element TypeANY ACCEPTABLE
Surface TreatmentPAINT OUTSIDE
Heating Capacity Per Hour306.0 GALLONS
Temp Rise Per Hour90.0 FAHRENHEIT DEGF
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5330-00-171-657517746 INTERCHANGEABLE
Gasket
Dana Automotive Systems Group, Llc Dba Dana Sealing Products
3110-00-338-2272185N114 INTERCHANGEABLE
Bearing,roller,thrust
Lockheed Martin Corporation Dba Lockheed Martin Div Rotary and Mission Systems
5331-00-349-8358 INTERCHANGEABLE
O-Ring
2530-00-589-8605F17507 INTERCHANGEABLE
Cylinder Assembly,hydraulic Brak
Federal Mogul Corp Sub Wagner Brake Moog Automotive Div
5330-00-710-665717746 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
4520-01-317-543617745 INTERCHANGEABLE
Heater,water,electric
The Electric Heater Co Dba Hubbell Electric Heater Co.
4520-01-317-8979 INTERCHANGEABLE
Heater,water,electric
4520-01-377-7463F404403ES INTERCHANGEABLE
Heating Element,electrical,immer
The Electric Heater Co Dba Hubbell Electric Heater Co.
5995-01-380-433317746 10 B1 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Volex, Inc. Dba Volex Power Cord Products Div Volex Inc.
4820-01-385-126917633 INTERCHANGEABLE
Diaphragm,valve,flat
Imi Cash Valve Inc
Cross-Reference Index
Part NumberManufacturer
17746 PRIMARY The Electric Heater Co Dba Hubbell Electric Heater Co. (USA)
MIL-H-965D Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5330-00-171-6575INTERCHANGEABLE
GASKET
17746
3110-00-338-2272INTERCHANGEABLE
BEARING,ROLLER,THRUST
185N114
5331-00-349-8358INTERCHANGEABLE
O-RING
2530-00-589-8605INTERCHANGEABLE
CYLINDER ASSEMBLY,HYDRAULIC BRAK
F17507
5330-00-710-6657INTERCHANGEABLE
SEAL,PLAIN ENCASED
17746
4520-01-317-5436INTERCHANGEABLE
HEATER,WATER,ELECTRIC
17745
4520-01-317-8979INTERCHANGEABLE
HEATER,WATER,ELECTRIC
4520-01-377-7463INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,IMMER
F404403ES
5995-01-380-4333INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
17746 10 B1
4820-01-385-1269INTERCHANGEABLE
DIAPHRAGM,VALVE,FLAT
17633
5340-01-562-0912INTERCHANGEABLE
CLAMP,LOOP
17746

Frequently Asked Questions

What is NSN 4520-01-317-5438?

NSN 4520-01-317-5438 is a Heater,water,electric, manufactured by The Electric Heater Co Dba Hubbell Electric Heater Co., classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-01-317-5438?

NSN 4520-01-317-5438 has 2 cross-referenced part numbers: 17746 (The Electric Heater Co Dba Hubbell Electric Heater Co.), MIL-H-965D (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 4520-01-317-5438?

There are 11 known substitutes for 4520-01-317-5438: 5330-00-171-6575, 3110-00-338-2272, 5331-00-349-8358 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 17746?

Key specifications for 17746: Overall Length: 72.750 INCHES NOMINAL IN; Capacity: 306.0 GALLONS TANK; Water Inlet Connection Thread Size and Series/type Designator: 1-11-1/2 NPT; Insulated Feature: NOT INCLUDED. 20 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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