PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS90386-6HMeter,time Totalizing

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 6645-00-762-6538 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-762-6538 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-762-6538. Primary manufacturer part number: MS90386-6H.
Features
  • Meter,time Totalizing — FSC 6645
  • Terminal Type: SOLDER
  • Body Depth: 0.200 INCHES NOMINAL IN
  • Scale Smallest Increment: 250.00 HOURS
  • Scale Range: +0.0 TO 5000.0 HOUR
  • Reset Feature: NOT PROVIDED
  • Hermetic Protection: NOT PROVIDED
  • Movement Type: ELECTROCHEMICAL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Meter,time Totalizing, cataloged under National Stock Number 6645-00-762-6538, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6645-00-762-6538
Primary Part NumberMS90386-6H
Item NameMeter,time Totalizing
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Terminal TypeSOLDER
Body Depth0.200 INCHES NOMINAL IN
Scale Smallest Increment250.00 HOURS
Scale Range+0.0 TO 5000.0 HOUR
Reset FeatureNOT PROVIDED
Hermetic ProtectionNOT PROVIDED
Movement TypeELECTROCHEMICAL
Inscription ColorWHITE
Mounting MethodFLUSH
Mounting ConfigurationTWO 0.125 IN. DIA MTG HOLES SPACED1.320 IN. C TO C ON HORIZONTAL CENTER LINE IN
Inscription Background ColorBLACK
Unit TypeMOUNTED
Voltage Rating28.0 VOLTS NOMINAL
Indicator TypeSCALE
Body Width0.300 INCHES NOMINAL IN
Body Length1.600 INCHES NOMINAL IN
Current TypeDC
Mounting TypePANEL
Terminal Quantity2
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
6645-00-015-6018 INTERCHANGEABLE
Meter,time Totalizing
6645-00-115-5847 INTERCHANGEABLE
Meter,time Totalizing
6645-00-547-2176 INTERCHANGEABLE
Meter,time Totalizing
6645-00-854-1080 INTERCHANGEABLE
Meter,time Totalizing
6645-01-082-0518 INTERCHANGEABLE
Meter,time Totalizing
Cross-Reference Index
Part NumberManufacturer
MS90386-6H Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
620-NB Curtis Instruments, Inc. Dba Curtis Pmc Division (USA)
Related Parts
6645-00-015-6018INTERCHANGEABLE
METER,TIME TOTALIZING
6645-00-115-5847INTERCHANGEABLE
METER,TIME TOTALIZING
6645-00-547-2176INTERCHANGEABLE
METER,TIME TOTALIZING
6645-00-854-1080INTERCHANGEABLE
METER,TIME TOTALIZING
6645-01-082-0518INTERCHANGEABLE
METER,TIME TOTALIZING

Frequently Asked Questions

What is NSN 6645-00-762-6538?

NSN 6645-00-762-6538 is a Meter,time Totalizing, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-00-762-6538?

NSN 6645-00-762-6538 has 2 cross-referenced part numbers: MS90386-6H (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 620-NB (Curtis Instruments, Inc. Dba Curtis Pmc Division).

What NSN replaces 6645-00-762-6538?

There are 5 known substitutes for 6645-00-762-6538: 6645-00-015-6018, 6645-00-115-5847, 6645-00-547-2176 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS90386-6H?

Key specifications for MS90386-6H: Terminal Type: SOLDER; Body Depth: 0.200 INCHES NOMINAL IN; Scale Smallest Increment: 250.00 HOURS; Scale Range: +0.0 TO 5000.0 HOUR. 19 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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