PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

99121904Gear,spur

Alfa Laval Inc · NSN 3020-00-269-9687 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-269-9687 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-269-9687. Primary manufacturer part number: 99121904.
Features
  • Gear,spur — FSC 3020
  • Teeth Quantity: 43
  • Material: COPPER ALLOY OVERALL
  • Nominal Distance Between Body Face and Protruding Hub End: 0.6780 INCHES FIRST END IN
  • Nominal Outside Diameter: 2.8125 INCHES IN
  • Material Document and Classification: MIL-C-15345 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Body Style: WEBBED, OFFSET, SOLID
  • Tooth Form: STANDARD
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
  • Applications requiring Copper Alloy Overall construction
General Description

The Gear,spur, cataloged under National Stock Number 3020-00-269-9687, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Alfa Laval Inc. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 1 manufacturer, 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
NSN3020-00-269-9687
Primary Part Number99121904
Item NameGear,spur
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerAlfa Laval Inc
StatusACTIVE
Teeth Quantity43
MaterialCOPPER ALLOY OVERALL
Nominal Distance Between Body Face and Protruding Hub End0.6780 INCHES FIRST END IN
Nominal Outside Diameter2.8125 INCHES IN
Material Document and ClassificationMIL-C-15345 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Body StyleWEBBED, OFFSET, SOLID
Tooth FormSTANDARD
Style DesignatorONE PROTRUDING HUB, ONE FLUSH HUB
Bore StylePLAIN BOTH ENDS
Hub Style DesignatorPLAIN BOTH ENDS
Hub Nominal Diameter1.4450 INCHES FIRST END IN
Hub Nominal Diameter1.2090 INCHES SECOND END IN
Face Nominal Width0.5450 INCHES IN
Pressure Angle14.5000 DEGREES
Bore Nominal Diameter0.6850 INCHES BOTH ENDS IN
Pitch Diameter2.6875 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
1650-00-083-404021904 INTERCHANGEABLE
Piston,linear Actuating Cylinder
Mid-America Aerotech, Llc
5930-00-101-22982890907-1 INTERCHANGEABLE
Switch,thermostatic
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5965-00-404-048621904 INTERCHANGEABLE
Shell,microphone
Astrocom Electronics Inc
4330-00-478-657421904 INTERCHANGEABLE
Filter,special
Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div
5310-00-741-137921-904 INTERCHANGEABLE
Nut,plain,octagon
Pdi Ground Support Systems, Inc.
5342-01-011-022921904 INTERCHANGEABLE
Handle,handwheel
Jergens Inc Div Tooling Components Division
4810-01-049-372321904 INTERCHANGEABLE
Plunger,valve
Eaton Aerospace Llc
5940-01-089-25404878-14-1 INTERCHANGEABLE
Terminal,stud
Advanced Interconnections Corporation
3460-01-360-037621904 INTERCHANGEABLE
Arbor,hole Saw
Black and Decker Us Inc
Cross-Reference Index
Part NumberManufacturer
A1210PC31 Alfa Laval Inc (USA)
A1161PC31 Alfa Laval Inc (USA)
A989PC31 Alfa Laval Inc (USA)
A1127PC31 Alfa Laval Inc (USA)
21904 Alfa Laval Inc (USA)
A915PC31 Alfa Laval Inc (USA)
A1211PC31 Alfa Laval Inc (USA)
A1126PC31 Alfa Laval Inc (USA)
A1066PC31 Alfa Laval Inc (USA)
A990PC31 Alfa Laval Inc (USA)
A1162PC31 Alfa Laval Inc (USA)
A1065PC31 Alfa Laval Inc (USA)
99121904 PRIMARY Alfa Laval Inc (USA)
A914PC31 Alfa Laval Inc (USA)
Related Parts
1650-00-083-4040INTERCHANGEABLE
PISTON,LINEAR ACTUATING CYLINDER
21904
5930-00-101-2298INTERCHANGEABLE
SWITCH,THERMOSTATIC
2890907-1
5965-00-404-0486INTERCHANGEABLE
SHELL,MICROPHONE
21904
4330-00-478-6574INTERCHANGEABLE
FILTER,SPECIAL
21904
5310-00-741-1379INTERCHANGEABLE
NUT,PLAIN,OCTAGON
21-904
5342-01-011-0229INTERCHANGEABLE
HANDLE,HANDWHEEL
21904
4810-01-049-3723INTERCHANGEABLE
PLUNGER,VALVE
21904
5940-01-089-2540INTERCHANGEABLE
TERMINAL,STUD
4878-14-1
3460-01-360-0376INTERCHANGEABLE
ARBOR,HOLE SAW
21904

Frequently Asked Questions

What is NSN 3020-00-269-9687?

NSN 3020-00-269-9687 is a Gear,spur, manufactured by Alfa Laval Inc, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-269-9687?

NSN 3020-00-269-9687 has 14 cross-referenced part numbers: A1210PC31 (Alfa Laval Inc), A1161PC31 (Alfa Laval Inc), A989PC31 (Alfa Laval Inc), A1127PC31 (Alfa Laval Inc), 21904 (Alfa Laval Inc) and 9 more.

What NSN replaces 3020-00-269-9687?

There are 9 known substitutes for 3020-00-269-9687: 1650-00-083-4040, 5930-00-101-2298, 5965-00-404-0486 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 99121904?

Key specifications for 99121904: Teeth Quantity: 43; Material: COPPER ALLOY OVERALL; Nominal Distance Between Body Face and Protruding Hub End: 0.6780 INCHES FIRST END IN; Nominal Outside Diameter: 2.8125 INCHES IN. 17 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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