PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

490128Scale,cathode Ray Tube

The Boeing Company Div Defense · NSN 6625-00-669-8742 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-00-669-8742 — this item is cataloged by the U.S. Government under National Stock Number 6625-00-669-8742. Primary manufacturer part number: 490128.
Features
  • Scale,cathode Ray Tube — FSC 6625
  • Scale Quantity: 2
  • Mounting Configuration: 3 RADIAL MTG TABS 120 DEG APART WHICH SLIP BETWEEN TUBE AND VISOR
  • Overall Diameter: 2.875 INCHES NOMINAL IN
  • Scale Division Quantity: 10
  • Overall Thickness: 0.020 INCHES NOMINAL IN
  • Scale Type: HORIZONTAL AND VERTICAL
  • Material: PLASTIC METHYL METHACRYLATE SCALE
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Plastic Methyl Methacrylate Scale construction
General Description

The Scale,cathode Ray Tube, cataloged under National Stock Number 6625-00-669-8742, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is The Boeing Company Div Defense. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-00-669-8742
Primary Part Number490128
Item NameScale,cathode Ray Tube
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerThe Boeing Company Div Defense
StatusACTIVE
Scale Quantity2
Mounting Configuration3 RADIAL MTG TABS 120 DEG APART WHICH SLIP BETWEEN TUBE AND VISOR
Overall Diameter2.875 INCHES NOMINAL IN
Scale Division Quantity10
Overall Thickness0.020 INCHES NOMINAL IN
Scale TypeHORIZONTAL AND VERTICAL
MaterialPLASTIC METHYL METHACRYLATE SCALE
Scale Quantity2
Mounting Configuration3 RADIAL MTG TABS 120 DEG APART WHICH SLIP BETWEEN TUBE AND VISOR
Overall Diameter2.875 INCHES NOMINAL IN
Scale Division Quantity10
Overall Thickness0.020 INCHES NOMINAL IN
Scale TypeHORIZONTAL AND VERTICAL
MaterialPLASTIC METHYL METHACRYLATE SCALE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeX
Weight0.2500 lbs
Cube0.0208 cu ft
Verified Substitutes 4
9150-00-265-940849012-8 INTERCHANGEABLE
Hydraulic Fluid,petroleum Base
Mobil Oil Corp
5310-00-941-9644490128 INTERCHANGEABLE
Nut,plain,extended Washer,double
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
5950-01-384-6093490128 INTERCHANGEABLE
Coil,radio Frequency
Datron World Communications, Inc.
6130-01-683-095249-0128 INTERCHANGEABLE
Power Supply
Rki Instruments, Inc. Dba Rki Instruments Inc
Cross-Reference Index
Part NumberManufacturer
490128A Mcdonnell Douglas Corp Mcdonnell Douglas Aerospace Opns West (USA)
490128 PRIMARY The Boeing Company Div Defense (USA)
490128 Mcdonnell Douglas Corp Mcdonnell Douglas Aerospace Opns West (USA)
Related Parts
9150-00-265-9408INTERCHANGEABLE
HYDRAULIC FLUID,PETROLEUM BASE
49012-8
5310-00-941-9644INTERCHANGEABLE
NUT,PLAIN,EXTENDED WASHER,DOUBLE
490128
5950-01-384-6093INTERCHANGEABLE
COIL,RADIO FREQUENCY
490128
6130-01-683-0952INTERCHANGEABLE
POWER SUPPLY
49-0128

Frequently Asked Questions

What is NSN 6625-00-669-8742?

NSN 6625-00-669-8742 is a Scale,cathode Ray Tube, manufactured by The Boeing Company Div Defense, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-00-669-8742?

NSN 6625-00-669-8742 has 3 cross-referenced part numbers: 490128A (Mcdonnell Douglas Corp Mcdonnell Douglas Aerospace Opns West), 490128 (The Boeing Company Div Defense), 490128 (Mcdonnell Douglas Corp Mcdonnell Douglas Aerospace Opns West).

What NSN replaces 6625-00-669-8742?

There are 4 known substitutes for 6625-00-669-8742: 9150-00-265-9408, 5310-00-941-9644, 5950-01-384-6093 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 490128?

Key specifications for 490128: Scale Quantity: 2; Mounting Configuration: 3 RADIAL MTG TABS 120 DEG APART WHICH SLIP BETWEEN TUBE AND VISOR; End Item Identification: TYPE OS-8A/U A; Overall Diameter: 2.875 INCHES NOMINAL IN. 16 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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