PartsTable TECHNICAL DATA SHEET

NSN 3020-01-149-7907Government record, cited

Gear Sector, Worm Wheel3020-01-149-7907

NSN 3020-01-149-7907 · NIIN 011497907

FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain · FSG 30 — Mechanical Power Transmission Equipment

Government record, cited

Also searched as 3020-01-149-7907 · 3020011497907 · NIIN 011497907 · 01-149-7907 · FSC 3020 Gears, Pulleys, Sprockets, and Transmission Chain · SS845 2068554 · 2640-617 · 2068554 · 2640-617 PIECE 4 AND 16 · 845-2068554 PIECE 4 AND 16

Nearby stock numbers ← 3020-01-149-7500 Pinion Gear · 3020-01-149-7908 Gear Set →

Features

Gear Sector,worm Wheel — FSC 3020
Bore Nominal Diameter: 0.969 INCHES BOTH ENDS IN
Teeth Quantity: 40
Bore Style: STRAIGHT SPLINE BOTH ENDS
Nominal Overall Length: 11.625 INCHES IN
Spline Quantity: 10 BOTH ENDS
Pitch Radius: 3.5625 INCHES NOMINAL IN
Pressure Angle: 20.0000 DEGREES

Identification

NSN: 3020-01-149-7907
NIIN: 011497907
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
FSG: 30 — Mechanical Power Transmission Equipment

General Description

The Gear Sector,worm Wheel, cataloged under National Stock Number 3020-01-149-7907, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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	3020-01-149-7907
Item Name	Gear Sector,worm Wheel
FSC / FSG	3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain
Status	ACTIVE
Bore Nominal Diameter	0.969 INCHES BOTH ENDS IN
Teeth Quantity	40
Bore Style	STRAIGHT SPLINE BOTH ENDS
Nominal Overall Length	11.625 INCHES IN
Spline Quantity	10 BOTH ENDS
Pitch Radius	3.5625 INCHES NOMINAL IN
Pressure Angle	20.0000 DEGREES
Material	NICKEL ALLOY K-500 OVERALL
Face Nominal Width	1.438 INCHES 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 7

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

3020-01-170-97972640-617 POSSIBLE MATCH

GEAR SET,WORM AND WORM WHEEL,MAT

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

4820-01-197-49432640-617 ASSEMBLY G POSSIBLE MATCH

GEAR OPERATOR,VALVE

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

4820-01-208-31342640-617 ASSY BB POSSIBLE MATCH

OPERATOR,VALVE,MANUAL

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

3020-01-424-7398845-2068554 ITEM 5 POSSIBLE MATCH

GEAR SECTOR,WORM WHEEL

Possible match (shared part number)Naval Sea Systems Command

3020-01-424-7399845-2068554 ITEM 4 POSSIBLE MATCH

GEAR SECTOR,WORM WHEEL

Possible match (shared part number)Naval Sea Systems Command

4820-01-424-9076845-2068554 ASSY C POSSIBLE MATCH

GEAR OPERATOR,VALVE

Possible match (shared part number)Naval Ship Systems Command

4820-01-424-9820845-2068554 ASSY A POSSIBLE MATCH

GEAR OPERATOR,VALVE

Possible match (shared part number)Naval Ship Systems Command

Cross-Reference Index

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

Reference documents

Reference	Meaning
SS845 2068554	D/9 Drawing number reference only U.S. Government activity
2640-617	D/9 Drawing number reference only U.S. Government activity
2068554	D/9 Drawing number reference only U.S. Government activity
2640-617 PIECE 4 AND 16	3/2 Design control — primary reference U.S. Government activity
845-2068554 PIECE 4 AND 16	3/2 Design control — primary reference U.S. Government activity

Related Parts

3020-01-170-9797POSSIBLE MATCH

GEAR SET,WORM AND WORM WHEEL,MAT

2640-617

4820-01-197-4943POSSIBLE MATCH

GEAR OPERATOR,VALVE

2640-617 ASSEMBLY G

4820-01-208-3134POSSIBLE MATCH

OPERATOR,VALVE,MANUAL

2640-617 ASSY BB

3020-01-424-7398POSSIBLE MATCH

GEAR SECTOR,WORM WHEEL

845-2068554 ITEM 5

3020-01-424-7399POSSIBLE MATCH

GEAR SECTOR,WORM WHEEL

845-2068554 ITEM 4

4820-01-424-9076POSSIBLE MATCH

GEAR OPERATOR,VALVE

845-2068554 ASSY C

4820-01-424-9820POSSIBLE MATCH

GEAR OPERATOR,VALVE

845-2068554 ASSY A

Frequently Asked Questions

What is NSN 3020-01-149-7907?

NSN 3020-01-149-7907 is a Gear Sector,worm Wheel, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.

What NSN replaces 3020-01-149-7907?

7 possible matches (shared part number, not a government interchangeability claim): 3020-01-170-9797, 4820-01-197-4943, 4820-01-208-3134. Verify interchangeability with system specifications before substitution.

What are the specifications of 3020-01-149-7907?

Key specifications for 3020-01-149-7907: Bore Nominal Diameter: 0.969 INCHES BOTH ENDS IN; Teeth Quantity: 40; Bore Style: STRAIGHT SPLINE BOTH ENDS; Nominal Overall Length: 11.625 INCHES IN. 9 specifications are documented in the U.S. Government catalog.

Is NSN 3020-01-149-7907 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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