PartsTable TECHNICAL DATA SHEET
NSN 1240-01-528-9686Government record, cited

Retainer Knob1240-01-528-9686

NSN 1240-01-528-9686 · NIIN 015289686 · Part number 13480821
Us Army Aviation and Missile Command · FSC 1240 — Optical Sighting and Ranging Equipment · FSG 12 — Fire Control Equipment · CAGE 18876
Government record, cited
NSN 1240-01-528-9686 — this item is cataloged by the U.S. Government under National Stock Number 1240-01-528-9686. Manufacturer of record part number: 13480821.
Also searched as  1240-01-528-9686 · 1240015289686 · NIIN 015289686 · 01-528-9686 · FSC 1240 Optical Sighting and Ranging Equipment · CAGE 18876 · 13480821 · 1780821-0001
Nearby stock numbers  ·
Features
  • Retainer Knob — FSC 1240
  • 1 manufacturer part number on file
  • Manufacturer of record: Us Army Aviation and Missile Command
Identification
  • NSN: 1240-01-528-9686
  • NIIN: 015289686
  • FSC: 1240 — Optical Sighting and Ranging Equipment
  • FSG: 12 — Fire Control Equipment
  • Primary part number: 13480821
  • Manufacturer: Us Army Aviation and Missile Command
General Description

The Retainer Knob, cataloged under National Stock Number 1240-01-528-9686, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Us Army Aviation and Missile Command. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1240-01-528-9686
Primary Part Number13480821
Item NameRetainer Knob
FSC / FSG1240 / 12 — Optical Sighting and Ranging Equipment
ManufacturerUs Army Aviation and Missile Command
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL B — Remove Demilitarization Key Points
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
Cross-Reference Index
Part NumberManufacturer
13480821 PRIMARY Us Army Aviation and Missile Command (USA)
Reference documents
ReferenceMeaning
1780821-0001 5/2 Secondary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 1240 — Optical Sighting and Ranging Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1240-00-000-0160
SIGHT UNIT
1240-00-001-4014
1240-00-001-4014 · Item name not on file
1240-00-001-4015
1240-00-001-4015 · Item name not on file
1240-00-001-4488
FILTER,LIGHT,OPTICAL INSTRUMENT
1240-00-003-1076
1240-00-003-1076 · Item name not on file
1240-00-003-8404
1240-00-003-8404 · Item name not on file
1240-00-003-8405
1240-00-003-8405 · Item name not on file
1240-00-003-8406
MOUNT,TELESCOPE

Frequently Asked Questions

What is NSN 1240-01-528-9686?

NSN 1240-01-528-9686 is a Retainer Knob, manufactured by Us Army Aviation and Missile Command, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.

What part numbers are listed for NSN 1240-01-528-9686?

NSN 1240-01-528-9686 has 1 manufacturer part number on file: 13480821 (Us Army Aviation and Missile Command).

What are the specifications of 13480821?

Key specifications for 13480821: Overall Height: 0.423 INCHES NOMINAL IN; Overall Length: 1.240 INCHES NOMINAL IN; Overall Width: 0.374 INCHES NOMINAL IN; End Item Identification: TARGET ACQUISITION SUBSYSTEM. 0 specifications are documented in the U.S. Government catalog.

Is NSN 1240-01-528-9686 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

What is the DEMIL code for NSN 1240-01-528-9686?

NSN 1240-01-528-9686 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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