PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

100056Cell Assembly,optical Instrument

Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier · NSN 1240-00-026-4819 · FSC 1240 · No Item Name Available
Verified by PartsTable
NSN 1240-00-026-4819 — this item is cataloged by the U.S. Government under National Stock Number 1240-00-026-4819. Primary manufacturer part number: 100056.
Features
  • Cell Assembly,optical Instrument — FSC 1240
  • Optical Element Type: COMPOUND LENS
  • Eccentric Construction: NOT PROVIDED
  • Optical Element Quantity: 4
  • 2 verified cross-references
  • Primary manufacturer: Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Cell Assembly,optical Instrument, cataloged under National Stock Number 1240-00-026-4819, is classified within Federal Supply Class 1240 (No Item Name Available) of the Fire Control Equipment group. The primary manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 3 verified specifications, 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1240-00-026-4819
Primary Part Number100056
Item NameCell Assembly,optical Instrument
FSC / FSG1240 / 12 — No Item Name Available
ManufacturerNavair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
StatusACTIVE
Optical Element TypeCOMPOUND LENS
Eccentric ConstructionNOT PROVIDED
Optical Element Quantity4
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
7520-00-272-96837520-00-272-9683 INTERCHANGEABLE
Stencil Set,marking
National Industries for the Blind
5905-00-273-9465100-056 INTERCHANGEABLE
Resistor Network,fixed,film
Vishay Thin Film Llc Div Vishay Thin Film
4720-00-289-4615100056 INTERCHANGEABLE
Hose Assembly,metallic
Hyspan Precision Products, Inc.
5975-00-587-8859100056 INTERCHANGEABLE
Base,chassis
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5950-00-656-4304 INTERCHANGEABLE
Transformer,power
1680-00-676-402010-0056 INTERCHANGEABLE
Button,slide
Smyth Aerospace Manufacturing Ltd
5310-01-081-0795100056 INTERCHANGEABLE
Washer,flat
Kaman Aerospace Corporation
4820-01-198-3018100056 INTERCHANGEABLE
Body,valve
Niantic Tool, Inc. Dba Niantic Tool Co
5305-01-515-433710-0056 INTERCHANGEABLE
Screw,cap,hexagon Head
Parker Hannifin Corporation Div Village Marine Tech
5315-01-541-8406100056 INTERCHANGEABLE
Key,machine
Finn Corp Dba Finn Corp
Cross-Reference Index
Part NumberManufacturer
717105 Brunson Instrument Company Dba Brunson Instrument Company (USA)
100056 PRIMARY Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
Related Parts
7520-00-272-9683INTERCHANGEABLE
STENCIL SET,MARKING
7520-00-272-9683
5905-00-273-9465INTERCHANGEABLE
RESISTOR NETWORK,FIXED,FILM
100-056
4720-00-289-4615INTERCHANGEABLE
HOSE ASSEMBLY,METALLIC
100056
5975-00-587-8859INTERCHANGEABLE
BASE,CHASSIS
100056
5950-00-656-4304INTERCHANGEABLE
TRANSFORMER,POWER
1680-00-676-4020INTERCHANGEABLE
BUTTON,SLIDE
10-0056
5310-01-081-0795INTERCHANGEABLE
WASHER,FLAT
100056
4820-01-198-3018INTERCHANGEABLE
BODY,VALVE
100056
5305-01-515-4337INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
10-0056
5315-01-541-8406INTERCHANGEABLE
KEY,MACHINE
100056

Frequently Asked Questions

What is NSN 1240-00-026-4819?

NSN 1240-00-026-4819 is a Cell Assembly,optical Instrument, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 1240 (No Item Name Available). Status: active.

What are the part numbers for NSN 1240-00-026-4819?

NSN 1240-00-026-4819 has 2 cross-referenced part numbers: 717105 (Brunson Instrument Company Dba Brunson Instrument Company), 100056 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).

What NSN replaces 1240-00-026-4819?

There are 10 known substitutes for 1240-00-026-4819: 7520-00-272-9683, 5905-00-273-9465, 4720-00-289-4615 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 100056?

Key specifications for 100056: Optical Element Type: COMPOUND LENS; Eccentric Construction: NOT PROVIDED; Overall Length: 6.060 INCHES NOMINAL IN; Optical Element Quantity: 4. 4 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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