PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

D638Telescope,alignment

Davidson Optronics Inc. Dba Doi Venture · NSN 6650-00-862-2142 · FSC 6650 · No Item Name Available
Verified by PartsTable
NSN 6650-00-862-2142 — this item is cataloged by the U.S. Government under National Stock Number 6650-00-862-2142. Primary manufacturer part number: D638.
Features
  • Telescope,alignment — FSC 6650
  • General Characteristics Item Description: ACC 0.5 SEC OVER ONE ARC MIN,3 SEC OVER 20 MIN; 20 MIN ARC RANGE,0.2 SEC GRADUATION; DOT W/ ILLUMINATED RING RETICLE; 2.5 IN. DIA APERTURE; 20 IN. FOCAL L; 30/150 FT MEASURING RANGE; 2 DEG BASE ELEVATION,AZIMUTH ADJUSTMENT; 115 VAC TRANSFORMER,RHEOSTAT,GE 328 LAMP LIGHT SOURCE; GRAY ENAMEL FINISH; HARDWOOD CASE; 9 IN. H,6 IN. W,12.75 IN. D VAC
  • 2 verified cross-references
  • Primary manufacturer: Davidson Optronics Inc. Dba Doi Venture
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Telescope,alignment, cataloged under National Stock Number 6650-00-862-2142, is classified within Federal Supply Class 6650 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Davidson Optronics Inc. Dba Doi Venture. Government technical data includes 1 verified specification, 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6650-00-862-2142
Primary Part NumberD638
Item NameTelescope,alignment
FSC / FSG6650 / 66 — No Item Name Available
ManufacturerDavidson Optronics Inc. Dba Doi Venture
StatusACTIVE
General Characteristics Item DescriptionACC 0.5 SEC OVER ONE ARC MIN,3 SEC OVER 20 MIN; 20 MIN ARC RANGE,0.2 SEC GRADUATION; DOT W/ ILLUMINATED RING RETICLE; 2.5 IN. DIA APERTURE; 20 IN. FOCAL L; 30/150 FT MEASURING RANGE; 2 DEG BASE ELEVATION,AZIMUTH ADJUSTMENT; 115 VAC TRANSFORMER,RHEOSTAT,GE 328 LAMP LIGHT SOURCE; GRAY ENAMEL FINISH; HARDWOOD CASE; 9 IN. H,6 IN. W,12.75 IN. D VAC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
2920-00-427-6937D6374 INTERCHANGEABLE
Regulator,engine Generator
Transpo Electronics Inc
3455-01-044-4147 INTERCHANGEABLE
Cutter,milling,end
3455-01-044-4148716-091210 INTERCHANGEABLE
Cutter,milling,end
Doall Baltimore Company
3455-01-044-4150716-091616 INTERCHANGEABLE
Cutter,milling,end
Doall Baltimore Company
3455-01-044-4151716-091665 INTERCHANGEABLE
Cutter,milling,end
Doall Baltimore Company
3455-01-045-4016TABLE 21, D3/4IN INTERCHANGEABLE
Cutter,milling,end
The American Society of Mechanical Engineers
3455-01-063-7421 INTERCHANGEABLE
Cutter,milling,end
7690-01-629-6646D638 INTERCHANGEABLE
Decal
Alamo Group Texas Llc
Cross-Reference Index
Part NumberManufacturer
D638 PRIMARY Davidson Optronics Inc. Dba Doi Venture (USA)
8597820 Delco Electronics Corp Delco Systems Opns (USA)
Related Parts
2920-00-427-6937INTERCHANGEABLE
REGULATOR,ENGINE GENERATOR
D6374
3455-01-044-4147INTERCHANGEABLE
CUTTER,MILLING,END
3455-01-044-4148INTERCHANGEABLE
CUTTER,MILLING,END
716-091210
3455-01-044-4150INTERCHANGEABLE
CUTTER,MILLING,END
716-091616
3455-01-044-4151INTERCHANGEABLE
CUTTER,MILLING,END
716-091665
3455-01-045-4016INTERCHANGEABLE
CUTTER,MILLING,END
TABLE 21, D3/4IN
3455-01-063-7421INTERCHANGEABLE
CUTTER,MILLING,END
7690-01-629-6646INTERCHANGEABLE
DECAL
D638

Frequently Asked Questions

What is NSN 6650-00-862-2142?

NSN 6650-00-862-2142 is a Telescope,alignment, manufactured by Davidson Optronics Inc. Dba Doi Venture, classified under FSC 6650 (No Item Name Available). Status: active.

What are the part numbers for NSN 6650-00-862-2142?

NSN 6650-00-862-2142 has 2 cross-referenced part numbers: D638 (Davidson Optronics Inc. Dba Doi Venture), 8597820 (Delco Electronics Corp Delco Systems Opns).

What NSN replaces 6650-00-862-2142?

There are 8 known substitutes for 6650-00-862-2142: 2920-00-427-6937, 3455-01-044-4147, 3455-01-044-4148 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of D638?

Key specifications for D638: General Characteristics Item Description: ACC 0.5 SEC OVER ONE ARC MIN,3 SEC OVER 20 MIN; 20 MIN ARC RANGE,0.2 SEC GRADUATION; DOT W/ ILLUMINATED RING RETICLE; 2.5 IN. DIA APERTURE; 20 IN. FOCAL L; 30/150 FT MEASURING RANGE; 2 DEG BASE ELEVATION,AZIMUTH ADJUSTMENT; 115 VAC TRANSFORMER,RHEOSTAT,GE 328 LAMP LIGHT SOURCE; GRAY ENAMEL FINISH; HARDWOOD CASE; 9 IN. H,6 IN. W,12.75 IN. D VAC. 1 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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