Ring, Retaining, Optical Element1240-01-317-4871

NSN 1240-01-317-4871 · NIIN 013174871

FSC 1240 — Optical Sighting and Ranging Equipment · FSG 12 — Fire Control Equipment

Government record, cited

Also searched as 1240-01-317-4871 · 1240013174871 · NIIN 013174871 · 01-317-4871 · FSC 1240 Optical Sighting and Ranging Equipment

Nearby stock numbers ← 1240-01-317-3497 Ring, Retaining, Optical Element · 1240-01-317-6447 Window, Optical Instrument →

Features

Ring,retaining,optical Element — FSC 1240
Internal Flange Thickness: 0.045 INCHES NOMINAL IN
Outside Diameter: 5.750 INCHES NOMINAL IN
Aperture Diameter: 5.675 INCHES NOMINAL IN
Material: STEEL CORROSION RESISTING

Identification

NSN: 1240-01-317-4871
NIIN: 013174871
FSC: 1240 — Optical Sighting and Ranging Equipment
FSG: 12 — Fire Control Equipment

General Description

The Ring,retaining,optical Element, cataloged under National Stock Number 1240-01-317-4871, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	1240-01-317-4871
Item Name	Ring,retaining,optical Element
FSC / FSG	1240 / 12 — Optical Sighting and Ranging Equipment
Status	ACTIVE
Internal Flange Thickness	0.045 INCHES NOMINAL IN
Outside Diameter	5.750 INCHES NOMINAL IN
Aperture Diameter	5.675 INCHES NOMINAL IN
Material	STEEL CORROSION RESISTING

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL Q — CCL Item — Commerce Control List
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
J81Y0012-2	3/9 Design control — primary reference Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co

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.

1240-00-764-4734

SUNSHADE

1240-00-987-5071

1240-00-987-5071 · Item name not on file

1240-01-068-6676

HOLDER,OPTICAL ELEMENT

1240-01-082-8849

SIGHT,INFINITY

1240-01-090-0609

1240-01-090-0609 · Item name not on file

1240-01-102-4266

1240-01-102-4266 · Item name not on file

1240-01-110-9897

1240-01-110-9897 · Item name not on file

1240-01-361-6090

COLLIMATOR,INFINITY AIMING REFER

Frequently Asked Questions

What is NSN 1240-01-317-4871?

NSN 1240-01-317-4871 is a Ring,retaining,optical Element, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.

What are the specifications of 1240-01-317-4871?

Key specifications for 1240-01-317-4871: Internal Flange Thickness: 0.045 INCHES NOMINAL IN; Outside Diameter: 5.750 INCHES NOMINAL IN; Aperture Diameter: 5.675 INCHES NOMINAL IN; End Item Identification: F-15E,4920-01-242-5325. 4 specifications are documented in the U.S. Government catalog.

Is NSN 1240-01-317-4871 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 1240-01-317-4871?

NSN 1240-01-317-4871 has DEMIL Code Q. 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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