PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

816021-002Bearing Pump Assembly

Armstrong Pumps Inc · NSN 4320-00-905-0130 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-905-0130 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-905-0130. Primary manufacturer part number: 816021-002.
Features
  • Bearing Pump Assembly — FSC 4320
  • General Characteristics Item Description: STEEL SHAFT AND SPRING,ALUMINUM BODY,COPPER BEARING,FOUR MTG HOLES IN BASE
  • 4 verified cross-references
  • Primary manufacturer: Armstrong Pumps Inc
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Fluid transfer and circulation
  • Cooling system maintenance
General Description

The Bearing Pump Assembly, cataloged under National Stock Number 4320-00-905-0130, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Armstrong Pumps Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4320-00-905-0130
Primary Part Number816021-002
Item NameBearing Pump Assembly
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerArmstrong Pumps Inc
StatusCANCELLED
General Characteristics Item DescriptionSTEEL SHAFT AND SPRING,ALUMINUM BODY,COPPER BEARING,FOUR MTG HOLES IN BASE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
2530-00-693-1029 INTERCHANGEABLE
Nut,cap,dual Wheel Mounting
3510-00-868-903016021 INTERCHANGEABLE
Nozzle Assembly
Clayton Manufacturing Company
2540-01-074-255216021 INTERCHANGEABLE
Mirror Assembly,rearview
Grote Industries Inc Dba Grote Manufacturing Co Div Military Products
5305-01-077-0152 INTERCHANGEABLE
Screw,machine
4820-01-162-51671602-1 INTERCHANGEABLE
Indicator
Tate Andale, Llc
3413-01-169-671416-021 INTERCHANGEABLE
Drilling Machine,upright
Dumore Corporation
5315-01-240-1610 INTERCHANGEABLE
Pin,straight,headed
5985-01-315-3755218-0151-080 INTERCHANGEABLE
Base,antenna Support
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5915-01-358-601716021 INTERCHANGEABLE
Filter,band Pass
Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled
Cross-Reference Index
Part NumberManufacturer
816021-002 Armstrong Pumps Inc (USA)
PB1Z3351 Itt Bell and Gosset-Hydronics a Unit of Itt Fluid Handling Div (USA)
189034 Itt Bell and Gosset-Hydronics a Unit of Itt Fluid Handling Div (USA)
16021 Armstrong Pumps Inc (USA)
Related Parts
2530-00-693-1029INTERCHANGEABLE
NUT,CAP,DUAL WHEEL MOUNTING
3510-00-868-9030INTERCHANGEABLE
NOZZLE ASSEMBLY
16021
2540-01-074-2552INTERCHANGEABLE
MIRROR ASSEMBLY,REARVIEW
16021
5305-01-077-0152INTERCHANGEABLE
SCREW,MACHINE
4820-01-162-5167INTERCHANGEABLE
INDICATOR
1602-1
3413-01-169-6714INTERCHANGEABLE
DRILLING MACHINE,UPRIGHT
16-021
5315-01-240-1610INTERCHANGEABLE
PIN,STRAIGHT,HEADED
5985-01-315-3755INTERCHANGEABLE
BASE,ANTENNA SUPPORT
218-0151-080
5915-01-358-6017INTERCHANGEABLE
FILTER,BAND PASS
16021

Frequently Asked Questions

What is NSN 4320-00-905-0130?

NSN 4320-00-905-0130 is a Bearing Pump Assembly, manufactured by Armstrong Pumps Inc, classified under FSC 4320 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4320-00-905-0130?

NSN 4320-00-905-0130 has 4 cross-referenced part numbers: 816021-002 (Armstrong Pumps Inc), PB1Z3351 (Itt Bell and Gosset-Hydronics a Unit of Itt Fluid Handling Div), 189034 (Itt Bell and Gosset-Hydronics a Unit of Itt Fluid Handling Div), 16021 (Armstrong Pumps Inc).

What NSN replaces 4320-00-905-0130?

There are 9 known substitutes for 4320-00-905-0130: 2530-00-693-1029, 3510-00-868-9030, 2540-01-074-2552 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 816021-002?

Key specifications for 816021-002: General Characteristics Item Description: STEEL SHAFT AND SPRING,ALUMINUM BODY,COPPER BEARING,FOUR MTG HOLES IN BASE. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4320-00-905-0130 still in active supply?

NSN 4320-00-905-0130 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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