PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A391Cap,lens

Lightforce Usa, Incorporated Div Mil-Gov-Le · NSN 6650-01-654-6184 · FSC 6650 · No Item Name Available
Verified by PartsTable
NSN 6650-01-654-6184 — this item is cataloged by the U.S. Government under National Stock Number 6650-01-654-6184. Primary manufacturer part number: A391.
Features
  • Cap,lens — FSC 6650
  • 1 verified cross-reference
  • Primary manufacturer: Lightforce Usa, Incorporated Div Mil-Gov-Le
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Cap,lens, cataloged under National Stock Number 6650-01-654-6184, is classified within Federal Supply Class 6650 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Lightforce Usa, Incorporated Div Mil-Gov-Le. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6650-01-654-6184
Primary Part NumberA391
Item NameCap,lens
FSC / FSG6650 / 66 — No Item Name Available
ManufacturerLightforce Usa, Incorporated Div Mil-Gov-Le
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
4320-00-683-8554A391 INTERCHANGEABLE
Impeller,pump,centrifugal
Circor Naval Solutions Llc Dba Warren Pumps
5360-00-715-1988 INTERCHANGEABLE
Spring,helical,compression
6150-00-978-131445000209 INTERCHANGEABLE
Cable Assembly,power,electrical,
Ncr Corporation Dba Ncr
6110-01-063-0596A391 INTERCHANGEABLE
Panel,power Distribution
Lockheed Martin Corp
6105-01-365-4259E865 INTERCHANGEABLE
Motor,alternating Current
General Electric Co Motor Business Group
5310-01-495-5743A-391 INTERCHANGEABLE
Washer,flat
L.c.doane Company,the Dba Lc Doane Co
Cross-Reference Index
Part NumberManufacturer
A391 PRIMARY Lightforce Usa, Incorporated Div Mil-Gov-Le (USA)
Related Parts
4320-00-683-8554INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
A391
5360-00-715-1988INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
6150-00-978-1314INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL,
45000209
6110-01-063-0596INTERCHANGEABLE
PANEL,POWER DISTRIBUTION
A391
6105-01-365-4259INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
E865
5310-01-495-5743INTERCHANGEABLE
WASHER,FLAT
A-391

Frequently Asked Questions

What is NSN 6650-01-654-6184?

NSN 6650-01-654-6184 is a Cap,lens, manufactured by Lightforce Usa, Incorporated Div Mil-Gov-Le, classified under FSC 6650 (No Item Name Available). Status: active.

What are the part numbers for NSN 6650-01-654-6184?

NSN 6650-01-654-6184 has 1 cross-referenced part number: A391 (Lightforce Usa, Incorporated Div Mil-Gov-Le).

What NSN replaces 6650-01-654-6184?

There are 6 known substitutes for 6650-01-654-6184: 4320-00-683-8554, 5360-00-715-1988, 6150-00-978-1314 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A391?

Key specifications for A391: Special Features: 4-16X42F1; Part Name Assigned by Controlling Agency: OBJECTIVE FLIP UP LENZ CAP & THREADED ADAPTER RING; End Item Identification: NIGHTFORCE MIL-SPEC SCOPES. 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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