PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

E102Ring,retaining,optical Element

Unertl John Optical Co Inc · NSN 1240-01-459-6694 · FSC 1240 · No Item Name Available
Verified by PartsTable
NSN 1240-01-459-6694 — this item is cataloged by the U.S. Government under National Stock Number 1240-01-459-6694. Primary manufacturer part number: E102.
Features
  • Ring,retaining,optical Element — FSC 1240
  • 1 verified cross-reference
  • Primary manufacturer: Unertl John Optical Co Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ring,retaining,optical Element, cataloged under National Stock Number 1240-01-459-6694, is classified within Federal Supply Class 1240 (No Item Name Available) of the Fire Control Equipment group. The primary manufacturer of record is Unertl John Optical Co Inc. This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN1240-01-459-6694
Primary Part NumberE102
Item NameRing,retaining,optical Element
FSC / FSG1240 / 12 — No Item Name Available
ManufacturerUnertl John Optical Co Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5985-00-146-7567 INTERCHANGEABLE
Attenuator,variable
5945-00-258-75853246675 INTERCHANGEABLE
Relay,electromagnetic
Hatch & Kirk, Inc.
5970-00-296-09688A168 INTERCHANGEABLE
Insulator,plate
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
3020-00-352-5906 INTERCHANGEABLE
Gear,spur
3456-00-640-3061F1385500PCC102LR102 INTERCHANGEABLE
CAGE Assembly,roller Tube Expand
Naval Ship Systems Command
5961-00-758-6300J202-18 INTERCHANGEABLE
Transistor
Siliconix Incorporated Div Siliconix
4320-00-932-4876679A0023C041A INTERCHANGEABLE
Liner,throat
Circor Naval Solutions Llc Dba Warren Pumps
6105-01-142-5264 INTERCHANGEABLE
Motor,alternating Current
5999-01-439-6852E102 INTERCHANGEABLE
Heater,thermal Release
Schneider Electric Usa, Inc.
4920-01-499-9261E102 INTERCHANGEABLE
Contactor,aircraft,
Koolant Koolers, Inc Dba Schreiber Engineering Corp Div
Cross-Reference Index
Part NumberManufacturer
E102 PRIMARY Unertl John Optical Co Inc (USA)
Related Parts
5985-00-146-7567INTERCHANGEABLE
ATTENUATOR,VARIABLE
5945-00-258-7585INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
3246675
5970-00-296-0968INTERCHANGEABLE
INSULATOR,PLATE
8A168
3020-00-352-5906INTERCHANGEABLE
GEAR,SPUR
3456-00-640-3061INTERCHANGEABLE
CAGE ASSEMBLY,ROLLER TUBE EXPAND
F1385500PCC102LR102
5961-00-758-6300INTERCHANGEABLE
TRANSISTOR
J202-18
4320-00-932-4876INTERCHANGEABLE
LINER,THROAT
679A0023C041A
6105-01-142-5264INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
5999-01-439-6852INTERCHANGEABLE
HEATER,THERMAL RELEASE
E102
4920-01-499-9261INTERCHANGEABLE
CONTACTOR,AIRCRAFT,
E102

Frequently Asked Questions

What is NSN 1240-01-459-6694?

NSN 1240-01-459-6694 is a Ring,retaining,optical Element, manufactured by Unertl John Optical Co Inc, classified under FSC 1240 (No Item Name Available). Status: active.

What are the part numbers for NSN 1240-01-459-6694?

NSN 1240-01-459-6694 has 1 cross-referenced part number: E102 (Unertl John Optical Co Inc).

What NSN replaces 1240-01-459-6694?

There are 10 known substitutes for 1240-01-459-6694: 5985-00-146-7567, 5945-00-258-7585, 5970-00-296-0968 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of E102?

Key specifications for E102: End Item Identification: SNIPER SCOPE, MODEL C3. 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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