PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

85325Meter,time Totalizing

Hobbs Corp · NSN 6645-01-442-0899 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-01-442-0899 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-442-0899. Primary manufacturer part number: 85325.
Features
  • Meter,time Totalizing — FSC 6645
  • Body Diameter: 2.210 INCHES NOMINAL IN
  • Smallest Increment Indicated: 0.10
  • Specification/standard Data: 81349-MIL-DTL-3971/1 GOVERNMENT SPECIFICATION
  • Measurement Unit: HOURS
  • Mounting Flange Diameter: 2.875 INCHES NOMINAL IN
  • Maximum Measurement: 9999.90
  • Unit Type: MOUNTED
Applications
  • Applications requiring Plastic Case construction
General Description

The Meter,time Totalizing, cataloged under National Stock Number 6645-01-442-0899, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Hobbs Corp. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6645-01-442-0899
Primary Part Number85325
Item NameMeter,time Totalizing
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerHobbs Corp
StatusACTIVE
Body Diameter2.210 INCHES NOMINAL IN
Smallest Increment Indicated0.10
Specification/standard Data81349-MIL-DTL-3971/1 GOVERNMENT SPECIFICATION
Measurement UnitHOURS
Mounting Flange Diameter2.875 INCHES NOMINAL IN
Maximum Measurement9999.90
Unit TypeMOUNTED
MaterialPLASTIC CASE
Movement TypeELECTRICAL
Background ColorBLACK BACKGROUND FOR HOURS AND WHITE BACKGROUND FOR TENTHS
Reset FeatureNOT PROVIDED
Mounting ConfigurationTHREE 0.150 IN. DIA MTG HOLES EQUALLY SPACED ON 1.265 IN RADIUS 120 DEG APART IN
Hermetic ProtectionNOT PROVIDED
Body Depth3.000 INCHES NOMINAL IN
Voltage Rating10.0 VOLTS MINIMUM AND 40.0 VOLTS MAXIMUM
Marking ColorWHITE NUMERALS FOR HOURS AND BLACK NUMERALS FOR TENTHS
Test Data Document81349-MIL-DTL-3971 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Current TypeDC
Mounting TypeFLANGE
Terminal TypeSTUD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
6645-00-089-8842 INTERCHANGEABLE
Meter,time Totalizing
6645-00-864-6794M3971/1-6-S INTERCHANGEABLE
Meter,time Totalizing
Maxima Technologies & Systems Llc
6645-00-880-4893 INTERCHANGEABLE
Meter,time Totalizing
6645-01-057-7987 INTERCHANGEABLE
Meter,time Totalizing
6645-01-378-1175 INTERCHANGEABLE
Meter,time Totalizing
Cross-Reference Index
Part NumberManufacturer
85325 Hobbs Corp (USA)
85325 Honeywell International Inc. Dba Honeyweel Sensing & Controls (USA)
MIL-DTL-3971 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M3971/1-1-S Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
12329689-1 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
Related Parts
6645-00-089-8842INTERCHANGEABLE
METER,TIME TOTALIZING
6645-00-864-6794INTERCHANGEABLE
METER,TIME TOTALIZING
M3971/1-6-S
6645-00-880-4893INTERCHANGEABLE
METER,TIME TOTALIZING
6645-01-057-7987INTERCHANGEABLE
METER,TIME TOTALIZING
6645-01-378-1175INTERCHANGEABLE
METER,TIME TOTALIZING

Frequently Asked Questions

What is NSN 6645-01-442-0899?

NSN 6645-01-442-0899 is a Meter,time Totalizing, manufactured by Hobbs Corp, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-01-442-0899?

NSN 6645-01-442-0899 has 5 cross-referenced part numbers: 85325 (Hobbs Corp), 85325 (Honeywell International Inc. Dba Honeyweel Sensing & Controls), MIL-DTL-3971 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M3971/1-1-S (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 12329689-1 (U S Army Tank Automotive Command Amsta-Im-Mm).

What NSN replaces 6645-01-442-0899?

There are 5 known substitutes for 6645-01-442-0899: 6645-00-089-8842, 6645-00-864-6794, 6645-00-880-4893 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 85325?

Key specifications for 85325: Body Diameter: 2.210 INCHES NOMINAL IN; Smallest Increment Indicated: 0.10; Specification/standard Data: 81349-MIL-DTL-3971/1 GOVERNMENT SPECIFICATION; Measurement Unit: HOURS. 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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