PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2A9-58Gear,spur

Dynalec Corporation · NSN 3020-01-064-7325 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-01-064-7325 — this item is cataloged by the U.S. Government under National Stock Number 3020-01-064-7325. Primary manufacturer part number: 2A9-58.
Features
  • Gear,spur — FSC 3020
  • Tooth Form: STANDARD
  • Mounting Hole Nominal Thread Size: 0.110 INCHES TRANSVERSELY THROUGH FACE IN
  • Style Designator: HUBLESS
  • Bore Nominal Diameter: 0.241 INCHES BOTH ENDS IN
  • Nominal Outside Diameter: 0.450 INCHES IN
  • Mounting Hole Type and Quantity: 2 THREADED TRANSVERSELY THROUGH FACE
  • Face Nominal Width: 0.500 INCHES IN
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Steel Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-01-064-7325, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Dynalec Corporation. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-01-064-7325
Primary Part Number2A9-58
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerDynalec Corporation
StatusACTIVE
Tooth FormSTANDARD
Mounting Hole Nominal Thread Size0.110 INCHES TRANSVERSELY THROUGH FACE IN
Style DesignatorHUBLESS
Bore Nominal Diameter0.241 INCHES BOTH ENDS IN
Nominal Outside Diameter0.450 INCHES IN
Mounting Hole Type and Quantity2 THREADED TRANSVERSELY THROUGH FACE
Face Nominal Width0.500 INCHES IN
Mounting Hole Thread Quantity Per Inch40 TRANSVERSELY THROUGH FACE
Pressure Angle20.0000 DEGREES
MaterialSTEEL OVERALL
Material Document and ClassificationMIL-S-16782 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Bore StylePLAIN BOTH ENDS
Mounting Hole Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH FACE
Teeth Quantity20
Attachment MethodMOUNTING HOLE
Pitch Diameter0.4166 INCHES NOMINAL IN
Body StylePLAIN, SOLID
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
6320-00-225-7013 INTERCHANGEABLE
Transmitter,propeller Revolution
3020-01-064-55973331242APC27 INTERCHANGEABLE
Gear,spur
Naval Sea Systems Command
3020-01-064-6126K136 INTERCHANGEABLE
Gear,spur
Dynalec Corporation
3020-01-064-73233331242APC30 INTERCHANGEABLE
Gear,helical
Naval Sea Systems Command
3020-01-064-7324K1385 INTERCHANGEABLE
Gear,spur
Dynalec Corporation
3020-01-065-2045 INTERCHANGEABLE
Gear,helical
3020-01-079-2146K154 INTERCHANGEABLE
Gear,helical
Dynalec Corporation
3020-01-079-8304KI53 INTERCHANGEABLE
Gear,helical
Dynalec Corporation
3020-01-094-52653331242A PIECE 26 INTERCHANGEABLE
Gear,spur
Naval Ship Systems Command
Cross-Reference Index
Part NumberManufacturer
3331242 Naval Sea Systems Command (USA)
2A9-58 PRIMARY Dynalec Corporation (USA)
3331242APC58 PRIMARY Naval Sea Systems Command (USA)
2A9-58 The Electric Tachometer Corp. (USA)
Related Parts
6320-00-225-7013INTERCHANGEABLE
TRANSMITTER,PROPELLER REVOLUTION
3020-01-064-5597INTERCHANGEABLE
GEAR,SPUR
3331242APC27
3020-01-064-6126INTERCHANGEABLE
GEAR,SPUR
K136
3020-01-064-7323INTERCHANGEABLE
GEAR,HELICAL
3331242APC30
3020-01-064-7324INTERCHANGEABLE
GEAR,SPUR
K1385
3020-01-065-2045INTERCHANGEABLE
GEAR,HELICAL
3020-01-079-2146INTERCHANGEABLE
GEAR,HELICAL
K154
3020-01-079-8304INTERCHANGEABLE
GEAR,HELICAL
KI53
3020-01-094-5265INTERCHANGEABLE
GEAR,SPUR
3331242A PIECE 26

Frequently Asked Questions

What is NSN 3020-01-064-7325?

NSN 3020-01-064-7325 is a Gear,spur, manufactured by Dynalec Corporation, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-01-064-7325?

NSN 3020-01-064-7325 has 4 cross-referenced part numbers: 3331242 (Naval Sea Systems Command), 2A9-58 (Dynalec Corporation), 3331242APC58 (Naval Sea Systems Command), 2A9-58 (The Electric Tachometer Corp.).

What NSN replaces 3020-01-064-7325?

There are 9 known substitutes for 3020-01-064-7325: 6320-00-225-7013, 3020-01-064-5597, 3020-01-064-6126 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2A9-58?

Key specifications for 2A9-58: Tooth Form: STANDARD; Mounting Hole Nominal Thread Size: 0.110 INCHES TRANSVERSELY THROUGH FACE IN; Special Features: SET SCREWS FURNISHED; Style Designator: HUBLESS. 18 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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