PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66120Boresight Assembly

L3 Technologies, Inc. Dba Insight Technology Division Div Insight Technology Division · NSN 5855-00-944-0949 · FSC 5855 · No Item Name Available
Verified by PartsTable
NSN 5855-00-944-0949 — this item is cataloged by the U.S. Government under National Stock Number 5855-00-944-0949. Primary manufacturer part number: 66120.
Features
  • Boresight Assembly — FSC 5855
  • 1 verified cross-reference
  • Primary manufacturer: L3 Technologies, Inc. Dba Insight Technology Division Div Insight Technology Division
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Boresight Assembly, cataloged under National Stock Number 5855-00-944-0949, is classified within Federal Supply Class 5855 (No Item Name Available) of the Communication, Detection, and Coherent Radiation Equipment group. The primary manufacturer of record is L3 Technologies, Inc. Dba Insight Technology Division Div Insight Technology Division. This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN5855-00-944-0949
Primary Part Number66120
Item NameBoresight Assembly
FSC / FSG5855 / 58 — No Item Name Available
ManufacturerL3 Technologies, Inc. Dba Insight Technology Division Div Insight Technology Division
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5130-00-423-3616 INTERCHANGEABLE
Valve,reversing
5120-01-430-8395 INTERCHANGEABLE
Wrench,open End
5120-01-520-56537037 INTERCHANGEABLE
Bar,pry
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
6515-01-566-117466120 INTERCHANGEABLE
Cannula,venous
Medtronic Inc Dlp Div
2540-01-622-619566120 INTERCHANGEABLE
Pin,pintle
Buyers Products Company
Cross-Reference Index
Part NumberManufacturer
66120 L3 Technologies, Inc. Dba Insight Technology Division Div Insight Technology Division (USA)
Related Parts
5130-00-423-3616INTERCHANGEABLE
VALVE,REVERSING
5120-01-430-8395INTERCHANGEABLE
WRENCH,OPEN END
5120-01-520-5653INTERCHANGEABLE
BAR,PRY
7037
6515-01-566-1174INTERCHANGEABLE
CANNULA,VENOUS
66120
2540-01-622-6195INTERCHANGEABLE
PIN,PINTLE
66120

Frequently Asked Questions

What is NSN 5855-00-944-0949?

NSN 5855-00-944-0949 is a Boresight Assembly, manufactured by L3 Technologies, Inc. Dba Insight Technology Division Div Insight Technology Division, classified under FSC 5855 (No Item Name Available). Status: active.

What are the part numbers for NSN 5855-00-944-0949?

NSN 5855-00-944-0949 has 1 cross-referenced part number: 66120 (L3 Technologies, Inc. Dba Insight Technology Division Div Insight Technology Division).

What NSN replaces 5855-00-944-0949?

There are 5 known substitutes for 5855-00-944-0949: 5130-00-423-3616, 5120-01-430-8395, 5120-01-520-5653 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 66120?

Key specifications for 66120: End Item Identification: ESA/OBS. 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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