PartsTable TECHNICAL DATA SHEET

NSN 2990-00-430-9508Government record, cited

Gear and Pulley, Engine Starting2990-00-430-9508

NSN 2990-00-430-9508 · NIIN 004309508 · Part number 23549

Komatsu America Corporation · FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft · FSG 29 — Engine Accessories · CAGE 23926

Government record, cited

NSN 2990-00-430-9508 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-430-9508. Manufacturer of record part number: 23549.

Also searched as 2990-00-430-9508 · 2990004309508 · NIIN 004309508 · 00-430-9508 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · CAGE 23926 · 23549 · R23549

Nearby stock numbers ← 2990-00-430-9434 Cap · 2990-00-430-9628 →

Features

Gear and Pulley,engine Starting — FSC 2990
General Characteristics Item Description: CAST STEEL; BEVEL GEAR,18 TEETH,4.500 IN.PITCH DIA,0.7854 IN.CIRCULAR PITCH; 1.062 IN.W ACROSS FACE OF PULLEY; 7.000 IN.OD; 0.312 IN.FROM HUB END TO PULLEY FACE; 2.750 IN.DIA HUB; 1.874 IN.MIN,1.875 IN.MAX BORE DIA; 1.500 IN.BORE LG; V SHAPE PULLEY GROOVE,38 DEG ANGLE,0.938 IN.W IN
1 manufacturer part number on file
Manufacturer of record: Komatsu America Corporation

Identification

NSN: 2990-00-430-9508
NIIN: 004309508
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories
Primary part number: 23549
Manufacturer: Komatsu America Corporation

General Description

The Gear and Pulley,engine Starting, cataloged under National Stock Number 2990-00-430-9508, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Komatsu America Corporation. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	2990-00-430-9508
Primary Part Number	23549
Item Name	Gear and Pulley,engine Starting
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Manufacturer	Komatsu America Corporation
Status	ACTIVE
General Characteristics Item Description	CAST STEEL; BEVEL GEAR,18 TEETH,4.500 IN.PITCH DIA,0.7854 IN.CIRCULAR PITCH; 1.062 IN.W ACROSS FACE OF PULLEY; 7.000 IN.OD; 0.312 IN.FROM HUB END TO PULLEY FACE; 2.750 IN.DIA HUB; 1.874 IN.MIN,1.875 IN.MAX BORE DIA; 1.500 IN.BORE LG; V SHAPE PULLEY GROOVE,38 DEG ANGLE,0.938 IN.W IN

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

⇄ Related Items 6

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

4320-00-913-1293 POSSIBLE MATCH

IMPELLER,PUMP,CENTRIFUGAL

Possible match (shared part number)

2530-01-038-1497F23549 POSSIBLE MATCH

CYLINDER ASSEMBLY,HYDRAULIC BRAK

Possible match (shared part number)Federal Mogul Corp Sub Wagner Brake Moog Automotive Div

3130-01-188-197523549 POSSIBLE MATCH

CAP,PILLOW BLOCK

Possible match (shared part number)Moog Inc. Dba Ampac-Isp Corp

3040-01-292-8602 POSSIBLE MATCH

GEARSHAFT,SPUR

Possible match (shared part number)

5330-01-366-509523549 POSSIBLE MATCH

SEAL,PLAIN

Possible match (shared part number)Tld Ace Corp Div Tld Ace

6515-01-595-5659M1923A POSSIBLE MATCH

FILTER LINE,MONITORING

Possible match (shared part number)Philips North America Llc Dba Philips Healthcare

Cross-Reference Index

Part Number	Manufacturer
23549 PRIMARY	Komatsu America Corporation (USA)

Reference documents

Reference	Meaning
R23549	5/9 Secondary reference Komatsu America Corporation

Related Parts

4320-00-913-1293POSSIBLE MATCH

IMPELLER,PUMP,CENTRIFUGAL

2530-01-038-1497POSSIBLE MATCH

CYLINDER ASSEMBLY,HYDRAULIC BRAK

F23549

3130-01-188-1975POSSIBLE MATCH

CAP,PILLOW BLOCK

23549

3040-01-292-8602POSSIBLE MATCH

GEARSHAFT,SPUR

5330-01-366-5095POSSIBLE MATCH

SEAL,PLAIN

23549

6515-01-595-5659POSSIBLE MATCH

FILTER LINE,MONITORING

M1923A

Frequently Asked Questions

What is NSN 2990-00-430-9508?

NSN 2990-00-430-9508 is a Gear and Pulley,engine Starting, manufactured by Komatsu America Corporation, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What part numbers are listed for NSN 2990-00-430-9508?

NSN 2990-00-430-9508 has 1 manufacturer part number on file: 23549 (Komatsu America Corporation).

What NSN replaces 2990-00-430-9508?

6 possible matches (shared part number, not a government interchangeability claim): 4320-00-913-1293, 2530-01-038-1497, 3130-01-188-1975. Verify interchangeability with system specifications before substitution.

What are the specifications of 23549?

Key specifications for 23549: General Characteristics Item Description: CAST STEEL; BEVEL GEAR,18 TEETH,4.500 IN.PITCH DIA,0.7854 IN.CIRCULAR PITCH; 1.062 IN.W ACROSS FACE OF PULLEY; 7.000 IN.OD; 0.312 IN.FROM HUB END TO PULLEY FACE; 2.750 IN.DIA HUB; 1.874 IN.MIN,1.875 IN.MAX BORE DIA; 1.500 IN.BORE LG; V SHAPE PULLEY GROOVE,38 DEG ANGLE,0.938 IN.W IN. 1 specification is documented in the U.S. Government catalog.

Is NSN 2990-00-430-9508 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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