PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40891Gear,spur

Liquid Controls, L.l.c. Div Idex Corporation · NSN 3020-00-450-1635 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-450-1635 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-450-1635. Primary manufacturer part number: 40891.
Features
  • Gear,spur — FSC 3020
  • Body Style: PLAIN, SOLID
  • Pitch Diameter: 1.7500 INCHES NOMINAL IN
  • Teeth Quantity: 28
  • Bore Style: W/ KEYWAY BOTH ENDS
  • Material: STEEL COMP 416 OVERALL
  • Hub Style Designator: PLAIN FIRST END
  • Nominal Outside Diameter: 1.868 INCHES IN
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Steel Comp 416 Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-00-450-1635, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Liquid Controls, L.l.c. Div Idex Corporation. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-00-450-1635
Primary Part Number40891
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerLiquid Controls, L.l.c. Div Idex Corporation
StatusACTIVE
Body StylePLAIN, SOLID
Pitch Diameter1.7500 INCHES NOMINAL IN
Teeth Quantity28
Bore StyleW/ KEYWAY BOTH ENDS
MaterialSTEEL COMP 416 OVERALL
Hub Style DesignatorPLAIN FIRST END
Nominal Outside Diameter1.868 INCHES IN
Nominal Distance From Bore Center to Keyway Bottom0.455 INCHES BOTH ENDS IN
Pressure Angle14.5000 DEGREES
Nominal Distance Between Body Face and Protruding Hub End0.250 INCHES FIRST END IN
Tooth FormSTANDARD
Keyway Nominal Width0.156 INCHES BOTH ENDS IN
Bore Nominal Diameter0.766 INCHES BOTH ENDS IN
Style DesignatorPROTRUDING HUB
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
Hub Nominal Diameter1.250 INCHES FIRST END IN
Hardness Rating28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
Face Nominal Width0.500 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
6645-00-225-26904089-1 INTERCHANGEABLE
Holder,stem Seal
Wakmann Watch Company Inc
5930-00-581-783540891 INTERCHANGEABLE
Switch Subassembly
Setra Systems, Inc. Dba Gems Sensors
5998-00-739-835740891 INTERCHANGEABLE
Circuit Card Assembly
Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
5999-00-967-3766G140-063 INTERCHANGEABLE
Mounting Pad,electrical-Electron
Kearfott Corporation Div Guidance and Navigation Division
5961-01-072-2300 INTERCHANGEABLE
Semiconductor Device,diode
5340-01-260-6258A4727-4TG INTERCHANGEABLE
Caster,rigid
Albion Industries, Inc.
Cross-Reference Index
Part NumberManufacturer
40891 PRIMARY Liquid Controls, L.l.c. Div Idex Corporation (USA)
M15B-40891 Liquid Controls, L.l.c. Div Idex Corporation (USA)
B40891 Liquid Controls, L.l.c. Div Idex Corporation (USA)
Related Parts
6645-00-225-2690INTERCHANGEABLE
HOLDER,STEM SEAL
4089-1
5930-00-581-7835INTERCHANGEABLE
SWITCH SUBASSEMBLY
40891
5998-00-739-8357INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
40891
5999-00-967-3766INTERCHANGEABLE
MOUNTING PAD,ELECTRICAL-ELECTRON
G140-063
5961-01-072-2300INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5340-01-260-6258INTERCHANGEABLE
CASTER,RIGID
A4727-4TG

Frequently Asked Questions

What is NSN 3020-00-450-1635?

NSN 3020-00-450-1635 is a Gear,spur, manufactured by Liquid Controls, L.l.c. Div Idex Corporation, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-450-1635?

NSN 3020-00-450-1635 has 3 cross-referenced part numbers: 40891 (Liquid Controls, L.l.c. Div Idex Corporation), M15B-40891 (Liquid Controls, L.l.c. Div Idex Corporation), B40891 (Liquid Controls, L.l.c. Div Idex Corporation).

What NSN replaces 3020-00-450-1635?

There are 6 known substitutes for 3020-00-450-1635: 6645-00-225-2690, 5930-00-581-7835, 5998-00-739-8357 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40891?

Key specifications for 40891: Body Style: PLAIN, SOLID; Pitch Diameter: 1.7500 INCHES NOMINAL IN; Teeth Quantity: 28; Bore Style: W/ KEYWAY BOTH ENDS. 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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