PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

41291Cap,lens

Energy Focus, Inc. Div Mmm · NSN 6650-01-665-5807 · FSC 6650 · No Item Name Available
Verified by PartsTable
NSN 6650-01-665-5807 — this item is cataloged by the U.S. Government under National Stock Number 6650-01-665-5807. Primary manufacturer part number: 41291.
Features
  • Cap,lens — FSC 6650
  • 3 verified cross-references
  • Primary manufacturer: Energy Focus, Inc. Div Mmm
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Cap,lens, cataloged under National Stock Number 6650-01-665-5807, is classified within Federal Supply Class 6650 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Energy Focus, Inc. Div Mmm. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6650-01-665-5807
Primary Part Number41291
Item NameCap,lens
FSC / FSG6650 / 66 — No Item Name Available
ManufacturerEnergy Focus, Inc. Div Mmm
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
1560-00-122-467541291 INTERCHANGEABLE
Housing,pulley
Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company
5360-00-786-807812629 INTERCHANGEABLE
Spring,helical,compression
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
4320-01-120-665641291 INTERCHANGEABLE
Piston
Parker Hannifin Corporation Div Hydraulic Systems Division
Cross-Reference Index
Part NumberManufacturer
EFO-FL11-303.4-LCS REV 1 ITEM 6 Energy Focus, Inc. Div Mmm (USA)
41291 PRIMARY Energy Focus, Inc. Div Mmm (USA)
41291 Atlantic Diving Supply, Inc. Dba Ads (USA)
Related Parts
1560-00-122-4675INTERCHANGEABLE
HOUSING,PULLEY
41291
5360-00-786-8078INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
12629
4320-01-120-6656INTERCHANGEABLE
PISTON
41291

Frequently Asked Questions

What is NSN 6650-01-665-5807?

NSN 6650-01-665-5807 is a Cap,lens, manufactured by Energy Focus, Inc. Div Mmm, classified under FSC 6650 (No Item Name Available). Status: active.

What are the part numbers for NSN 6650-01-665-5807?

NSN 6650-01-665-5807 has 3 cross-referenced part numbers: EFO-FL11-303.4-LCS REV 1 ITEM 6 (Energy Focus, Inc. Div Mmm), 41291 (Energy Focus, Inc. Div Mmm), 41291 (Atlantic Diving Supply, Inc. Dba Ads).

What NSN replaces 6650-01-665-5807?

There are 3 known substitutes for 6650-01-665-5807: 1560-00-122-4675, 5360-00-786-8078, 4320-01-120-6656. Verify interchangeability with system specifications before substitution.

What are the specifications of 41291?

Key specifications for 41291: Special Features: CAGE 1BD15 ENERGY FOCUS, INC.OEM; End Item Identification: FLOODLT ELEC; Part Name Assigned by Controlling Agency: LENS ASSEMBLY. 3 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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