PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

TA51Autocollimator,microptic

Engis Corporation · NSN 6650-00-968-5696 · FSC 6650 · No Item Name Available
Verified by PartsTable
NSN 6650-00-968-5696 — this item is cataloged by the U.S. Government under National Stock Number 6650-00-968-5696. Primary manufacturer part number: TA51.
Features
  • Autocollimator,microptic — FSC 6650
  • General Characteristics Item Description: 10 MIN. MEASURING RANGE,DIRECT READING TO 0.1 SEC; 19 MIN FIELD OF VIEW; 30 M WORKING DISTANCE; 43X MAG; EXTERNAL LAMP 6 VDC,2 WATTS; 57.145 MM BARREL DIA; 420 MM O/A L VDC
  • 2 verified cross-references
  • Primary manufacturer: Engis Corporation
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Autocollimator,microptic, cataloged under National Stock Number 6650-00-968-5696, is classified within Federal Supply Class 6650 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Engis Corporation. 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6650-00-968-5696
Primary Part NumberTA51
Item NameAutocollimator,microptic
FSC / FSG6650 / 66 — No Item Name Available
ManufacturerEngis Corporation
StatusCANCELLED
General Characteristics Item Description10 MIN. MEASURING RANGE,DIRECT READING TO 0.1 SEC; 19 MIN FIELD OF VIEW; 30 M WORKING DISTANCE; 43X MAG; EXTERNAL LAMP 6 VDC,2 WATTS; 57.145 MM BARREL DIA; 420 MM O/A L VDC
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
6650-01-201-7591142/13 INTERCHANGEABLE
Autocollimator
Taylor Hobson Inc
1005-01-527-7101SP-ACC3246-1 INTERCHANGEABLE
Mount,sight,small Arms
Trijicon, Inc. Dba Trijicon Inc
Cross-Reference Index
Part NumberManufacturer
TA51 Hilger and Watts Inc (USA)
TA51 PRIMARY Engis Corporation (USA)
Related Parts
6650-01-201-7591INTERCHANGEABLE
AUTOCOLLIMATOR
142/13
1005-01-527-7101INTERCHANGEABLE
MOUNT,SIGHT,SMALL ARMS
SP-ACC3246-1

Frequently Asked Questions

What is NSN 6650-00-968-5696?

NSN 6650-00-968-5696 is a Autocollimator,microptic, manufactured by Engis Corporation, classified under FSC 6650 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6650-00-968-5696?

NSN 6650-00-968-5696 has 2 cross-referenced part numbers: TA51 (Hilger and Watts Inc), TA51 (Engis Corporation).

What NSN replaces 6650-00-968-5696?

There are 2 known substitutes for 6650-00-968-5696: 6650-01-201-7591, 1005-01-527-7101. Verify interchangeability with system specifications before substitution.

What are the specifications of TA51?

Key specifications for TA51: General Characteristics Item Description: 10 MIN. MEASURING RANGE,DIRECT READING TO 0.1 SEC; 19 MIN FIELD OF VIEW; 30 M WORKING DISTANCE; 43X MAG; EXTERNAL LAMP 6 VDC,2 WATTS; 57.145 MM BARREL DIA; 420 MM O/A L VDC. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6650-00-968-5696 still in active supply?

NSN 6650-00-968-5696 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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