Hardness Rating: 21.0 ROCKWELL C MINIMUM AND 24.0 ROCKWELL C MAXIMUM OVERALL
Tooth Form: STANDARD
Pressure Angle: 14.5000 DEGREES
Material: STEEL COMP 1035 OVERALL
Identification
NSN: 3020-00-324-7640
NIIN: 003247640
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
FSG: 30 — Mechanical Power Transmission Equipment
General Description
The Gear,helical, cataloged under National Stock Number 3020-00-324-7640, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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
3020-00-324-7640
Item Name
Gear,helical
FSC / FSG
3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain
Status
ACTIVE
Teeth Quantity
27
Tooth Direction
LEFT
Teeth Type
SINGLE HELIX
Hardness Rating
21.0 ROCKWELL C MINIMUM AND 24.0 ROCKWELL C MAXIMUM OVERALL
Tooth Form
STANDARD
Pressure Angle
14.5000 DEGREES
Material
STEEL COMP 1035 OVERALL
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
DB7470
3/9Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3020-00-000-0091
GEAR,SPUR
3020-00-001-0027
3020-00-001-0027 · Item name not on file
3020-00-001-0028
3020-00-001-0028 · Item name not on file
3020-00-001-0063
3020-00-001-0063 · Item name not on file
3020-00-001-0064
3020-00-001-0064 · Item name not on file
3020-00-001-0066
3020-00-001-0066 · Item name not on file
3020-00-001-0071
3020-00-001-0071 · Item name not on file
3020-00-001-0072
3020-00-001-0072 · Item name not on file
Frequently Asked Questions
What is NSN 3020-00-324-7640?
NSN 3020-00-324-7640 is a Gear,helical, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
What are the specifications of 3020-00-324-7640?
Key specifications for 3020-00-324-7640: Teeth Quantity: 27; Tooth Direction: LEFT; Teeth Type: SINGLE HELIX; Hardness Rating: 21.0 ROCKWELL C MINIMUM AND 24.0 ROCKWELL C MAXIMUM OVERALL. 7 specifications are documented in the U.S. Government catalog.
Is NSN 3020-00-324-7640 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.