PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C4401Gear,worm

Thern Inc · NSN 3020-01-699-5365 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-01-699-5365 — this item is cataloged by the U.S. Government under National Stock Number 3020-01-699-5365. Primary manufacturer part number: C4401.
Features
  • Gear,worm — FSC 3020
  • Nominal Outside Diameter: 8.120 INCHES IN
  • Pitch Diameter: 7.750 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Thern Inc
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
General Description

The Gear,worm, cataloged under National Stock Number 3020-01-699-5365, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Thern Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-01-699-5365
Primary Part NumberC4401
Item NameGear,worm
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerThern Inc
StatusACTIVE
Nominal Outside Diameter8.120 INCHES IN
Pitch Diameter7.750 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5330-01-372-3015C-4401 INTERCHANGEABLE
Seal,nonmetallic Strip
Klinger Richard Inc
5330-01-388-1340C40456 ITEM 14 INTERCHANGEABLE
Gasket
Air/tak, Inc.
5330-01-408-71051052-D213-28 INTERCHANGEABLE
Gasket
Cepeda Associates, Inc. Dba Cepeda Associates Inc
5330-01-468-7668C4401 INTERCHANGEABLE
Gasket
Sealcraft Corporation
5330-01-699-5355A9967 INTERCHANGEABLE
Packing,preformed
Thern Inc
5330-01-699-5360A9518 INTERCHANGEABLE
Packing,preformed
Thern Inc
3020-01-699-5362A1612 INTERCHANGEABLE
Gear,worm
Thern Inc
Cross-Reference Index
Part NumberManufacturer
C4401 PRIMARY Thern Inc (USA)
A10777A-0514 Thern Inc (USA)
Related Parts
5330-01-372-3015INTERCHANGEABLE
SEAL,NONMETALLIC STRIP
C-4401
5330-01-388-1340INTERCHANGEABLE
GASKET
C40456 ITEM 14
5330-01-408-7105INTERCHANGEABLE
GASKET
1052-D213-28
5330-01-468-7668INTERCHANGEABLE
GASKET
C4401
5330-01-699-5355INTERCHANGEABLE
PACKING,PREFORMED
A9967
5330-01-699-5360INTERCHANGEABLE
PACKING,PREFORMED
A9518
3020-01-699-5362INTERCHANGEABLE
GEAR,WORM
A1612

Frequently Asked Questions

What is NSN 3020-01-699-5365?

NSN 3020-01-699-5365 is a Gear,worm, manufactured by Thern Inc, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-01-699-5365?

NSN 3020-01-699-5365 has 2 cross-referenced part numbers: C4401 (Thern Inc), A10777A-0514 (Thern Inc).

What NSN replaces 3020-01-699-5365?

There are 7 known substitutes for 3020-01-699-5365: 5330-01-372-3015, 5330-01-388-1340, 5330-01-408-7105 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of C4401?

Key specifications for C4401: Part Name Assigned by Controlling Agency: GEAR,WORM; End Item Identification: WINCH,HAND OPERATED; Special Features: RECESS DIAMETER 7.469 INCH, 2EEAD IN; Nominal Outside Diameter: 8.120 INCHES IN. 5 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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