Adapter, Filler Neck2990-01-546-9979

NSN 2990-01-546-9979 · NIIN 015469979 · Part number 18666B

Generac Mobile Products, Llc · FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft · FSG 29 — Engine Accessories · CAGE 0SUA9

Government record, cited

NSN 2990-01-546-9979 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-546-9979. Manufacturer of record part number: 18666B.

Also searched as 2990-01-546-9979 · 2990015469979 · NIIN 015469979 · 01-546-9979 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · CAGE 0SUA9 · 18666B · 19237

Nearby stock numbers ← 2990-01-546-9864 Radiator · 2990-01-546-9991 Weldment Assembly →

Features

Adapter,filler Neck — FSC 2990
1 manufacturer part number on file
Manufacturer of record: Generac Mobile Products, Llc

Identification

NSN: 2990-01-546-9979
NIIN: 015469979
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories
Primary part number: 18666B
Manufacturer: Generac Mobile Products, Llc

General Description

The Adapter,filler Neck, cataloged under National Stock Number 2990-01-546-9979, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Generac Mobile Products, Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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

Parameter	Value
NSN	2990-01-546-9979
Primary Part Number	18666B
Item Name	Adapter,filler Neck
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Manufacturer	Generac Mobile Products, Llc
Status	ACTIVE

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

Part Number	Manufacturer
18666B PRIMARY	Generac Mobile Products, Llc (USA)

Reference documents

Reference	Meaning
19237	5/9 Secondary reference Generac Mobile Products, Llc

Frequently Asked Questions

What is NSN 2990-01-546-9979?

NSN 2990-01-546-9979 is a Adapter,filler Neck, manufactured by Generac Mobile Products, Llc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What part numbers are listed for NSN 2990-01-546-9979?

NSN 2990-01-546-9979 has 1 manufacturer part number on file: 18666B (Generac Mobile Products, Llc).

What are the specifications of 18666B?

Key specifications for 18666B: Part Name Assigned by Controlling Agency: FITTING, FILLER NECK; End Item Identification: 6115-01-531-0571, GENERATOR SET 20KW 50/60HZ. 0 specifications are documented in the U.S. Government catalog.

Is NSN 2990-01-546-9979 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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