PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8204Hydrometer,graduated Scale

Kessler Thermometer Corp Dba Kessler Thermometers Corp · NSN 6630-01-665-8688 · FSC 6630 · No Item Name Available
Verified by PartsTable
NSN 6630-01-665-8688 — this item is cataloged by the U.S. Government under National Stock Number 6630-01-665-8688. Primary manufacturer part number: 8204.
Features
  • Hydrometer,graduated Scale — FSC 6630
  • Scale Range: -1.100 TO 1.150 SPECIFIC GRAVITY
  • 1 verified cross-reference
  • Primary manufacturer: Kessler Thermometer Corp Dba Kessler Thermometers Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Hydrometer,graduated Scale, cataloged under National Stock Number 6630-01-665-8688, is classified within Federal Supply Class 6630 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Kessler Thermometer Corp Dba Kessler Thermometers Corp. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6630-01-665-8688
Primary Part Number8204
Item NameHydrometer,graduated Scale
FSC / FSG6630 / 66 — No Item Name Available
ManufacturerKessler Thermometer Corp Dba Kessler Thermometers Corp
StatusACTIVE
Scale Range-1.100 TO 1.150 SPECIFIC GRAVITY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
4730-00-139-38318204 INTERCHANGEABLE
Clamp,repair,pipe
Southard Supply Inc
5985-00-192-0144 INTERCHANGEABLE
Dummy Load,electrical
5325-00-281-6606 INTERCHANGEABLE
Grommet,nonmetallic
2940-00-971-47758204 INTERCHANGEABLE
Prefilter,air Clean
Vortox Company
5920-01-316-65048204 INTERCHANGEABLE
Mat,electrostatic Discharging
Desco Industries, Inc. Dba Desco Industries Inc Div Desco
6320-01-371-05158204 INTERCHANGEABLE
Panel,alarm,shipboard
Hose-Mccann Telephone Co, Inc
3040-01-522-9967 INTERCHANGEABLE
Connecting Link,rigid
Cross-Reference Index
Part NumberManufacturer
8204 PRIMARY Kessler Thermometer Corp Dba Kessler Thermometers Corp (USA)
Related Parts
4730-00-139-3831INTERCHANGEABLE
CLAMP,REPAIR,PIPE
8204
5985-00-192-0144INTERCHANGEABLE
DUMMY LOAD,ELECTRICAL
5325-00-281-6606INTERCHANGEABLE
GROMMET,NONMETALLIC
2940-00-971-4775INTERCHANGEABLE
PREFILTER,AIR CLEAN
8204
5920-01-316-6504INTERCHANGEABLE
MAT,ELECTROSTATIC DISCHARGING
8204
6320-01-371-0515INTERCHANGEABLE
PANEL,ALARM,SHIPBOARD
8204
3040-01-522-9967INTERCHANGEABLE
CONNECTING LINK,RIGID

Frequently Asked Questions

What is NSN 6630-01-665-8688?

NSN 6630-01-665-8688 is a Hydrometer,graduated Scale, manufactured by Kessler Thermometer Corp Dba Kessler Thermometers Corp, classified under FSC 6630 (No Item Name Available). Status: active.

What are the part numbers for NSN 6630-01-665-8688?

NSN 6630-01-665-8688 has 1 cross-referenced part number: 8204 (Kessler Thermometer Corp Dba Kessler Thermometers Corp).

What NSN replaces 6630-01-665-8688?

There are 7 known substitutes for 6630-01-665-8688: 4730-00-139-3831, 5985-00-192-0144, 5325-00-281-6606 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8204?

Key specifications for 8204: Overall Length: 260.0 MILLIMETERS NOMINAL MM; Special Features: DIV 0.0005; Part Name Assigned by Controlling Agency: HYDROMETER; Scale Range: -1.100 TO 1.150 SPECIFIC GRAVITY. 4 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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