Ring, Retaining, Optical Element5855-01-284-0188

NSN 5855-01-284-0188 · NIIN 012840188

FSC 5855 — Night Vision Equipment, Emitted and Reflected Radiation · FSG 58 — Communication, Detection, and Coherent Radiation Equipment

Government record, cited

Also searched as 5855-01-284-0188 · 5855012840188 · NIIN 012840188 · 01-284-0188 · FSC 5855 Night Vision Equipment, Emitted and Reflected Radiation

Nearby stock numbers ← 5855-01-284-0187 · 5855-01-284-0189 →

Features

Ring,retaining,optical Element — FSC 5855
Internal Flange Thickness: 0.415 INCHES NOMINAL IN
Outside Diameter: 5.630 INCHES NOMINAL IN
Mounting Configuration: FIVE 0.112-40 UNC-2B HELICAL COIL INSERTS PLACED 72 DEGREES APART
Material: ALUMINUM ALLOY 356.0

Identification

NSN: 5855-01-284-0188
NIIN: 012840188
FSC: 5855 — Night Vision Equipment, Emitted and Reflected Radiation
FSG: 58 — Communication, Detection, and Coherent Radiation Equipment

General Description

The Ring,retaining,optical Element, cataloged under National Stock Number 5855-01-284-0188, is classified within Federal Supply Class 5855 (Night Vision Equipment, Emitted and Reflected Radiation) of the Communication, Detection, and Coherent Radiation 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4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	5855-01-284-0188
Item Name	Ring,retaining,optical Element
FSC / FSG	5855 / 58 — Night Vision Equipment, Emitted and Reflected Radiation
Status	ACTIVE
Internal Flange Thickness	0.415 INCHES NOMINAL IN
Outside Diameter	5.630 INCHES NOMINAL IN
Mounting Configuration	FIVE 0.112-40 UNC-2B HELICAL COIL INSERTS PLACED 72 DEGREES APART
Material	ALUMINUM ALLOY 356.0

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
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
2769258-2	3/2 Design control — primary reference U.S. Government activity

No interchangeability data on file.

Other items in FSC 5855 — Night Vision Equipment, Emitted and Reflected Radiation

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5855-00-003-2243

5855-00-003-2243 · Item name not on file

5855-00-003-3228

SUPPORT,SEARCHLIGH

5855-00-003-6408

LENS FILTER ASSY

5855-00-004-0904

PLATE

5855-00-004-1909

5855-00-004-1909 · Item name not on file

5855-00-006-9703

5855-00-006-9703 · Item name not on file

5855-00-007-5137

5855-00-007-5137 · Item name not on file

5855-00-010-0147

5855-00-010-0147 · Item name not on file

Frequently Asked Questions

What is NSN 5855-01-284-0188?

NSN 5855-01-284-0188 is a Ring,retaining,optical Element, classified under FSC 5855, Night Vision Equipment, Emitted and Reflected Radiation. Status: active.

What are the specifications of 5855-01-284-0188?

Key specifications for 5855-01-284-0188: Internal Flange Thickness: 0.415 INCHES NOMINAL IN; Outside Diameter: 5.630 INCHES NOMINAL IN; Mounting Configuration: FIVE 0.112-40 UNC-2B HELICAL COIL INSERTS PLACED 72 DEGREES APART; End Item Identification: INFRARED DETECTING SET AN/AAQ-17. 4 specifications are documented in the U.S. Government catalog.

Is NSN 5855-01-284-0188 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.

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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