PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A202Seal Assembly,pump

WS Darley & Co Div Ohler Pump · NSN 4930-00-789-7874 · FSC 4930 · No Item Name Available
Verified by PartsTable
NSN 4930-00-789-7874 — this item is cataloged by the U.S. Government under National Stock Number 4930-00-789-7874. Primary manufacturer part number: A202.
Features
  • Seal Assembly,pump — FSC 4930
  • General Characteristics Item Description: INCLUDES 1EA OF THE FOLLOWING ITEMS,FSCM 00299 D403 RUBBER CUP,D401 CERAMIC SEAT,D402 CARBON FACE,D405 STEEL CUP,D406 RETAINING BAND,D404 DIAPHRAGM,D408 SPRING,FREE O/A LG 2.038 IN,1.200 IN.COMPRESSED LG,FOR 1.000 IN.SHAFT IN
  • 1 verified cross-reference
  • Primary manufacturer: WS Darley & Co Div Ohler Pump
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
General Description

The Seal Assembly,pump, cataloged under National Stock Number 4930-00-789-7874, is classified within Federal Supply Class 4930 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is WS Darley & Co Div Ohler Pump. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference 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
NSN4930-00-789-7874
Primary Part NumberA202
Item NameSeal Assembly,pump
FSC / FSG4930 / 49 — No Item Name Available
ManufacturerWS Darley & Co Div Ohler Pump
StatusACTIVE
General Characteristics Item DescriptionINCLUDES 1EA OF THE FOLLOWING ITEMS,FSCM 00299 D403 RUBBER CUP,D401 CERAMIC SEAT,D402 CARBON FACE,D405 STEEL CUP,D406 RETAINING BAND,D404 DIAPHRAGM,D408 SPRING,FREE O/A LG 2.038 IN,1.200 IN.COMPRESSED LG,FOR 1.000 IN.SHAFT IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
2920-00-239-9047A202 INTERCHANGEABLE
Adapter,spark Plug
Champion Aerospace Llc
6810-00-268-9951 INTERCHANGEABLE
Nitric Acid,fuming
5305-00-439-9844A202 INTERCHANGEABLE
Screw,machine
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
1560-00-656-3572A202 INTERCHANGEABLE
Fitting,quick Disconnect,restrai
Rbc Aerostructures Llc
8010-00-886-7681 INTERCHANGEABLE
Remover,paint
6850-01-008-3058A202 INTERCHANGEABLE
Chemical Corrosion Prevention
The Noco Company
5950-01-139-0123A-202 INTERCHANGEABLE
Transformer,radio Frequency
Communication Coil, Inc. Div -
5935-01-205-4843A202 INTERCHANGEABLE
Adapter,connector
Fotec Inc
5998-01-255-9202 INTERCHANGEABLE
Electronic Components Assembly
Cross-Reference Index
Part NumberManufacturer
A202 PRIMARY WS Darley & Co Div Ohler Pump (USA)
Related Parts
2920-00-239-9047INTERCHANGEABLE
ADAPTER,SPARK PLUG
A202
6810-00-268-9951INTERCHANGEABLE
NITRIC ACID,FUMING
5305-00-439-9844INTERCHANGEABLE
SCREW,MACHINE
A202
1560-00-656-3572INTERCHANGEABLE
FITTING,QUICK DISCONNECT,RESTRAI
A202
8010-00-886-7681INTERCHANGEABLE
REMOVER,PAINT
6850-01-008-3058INTERCHANGEABLE
CHEMICAL CORROSION PREVENTION
A202
5950-01-139-0123INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
A-202
5935-01-205-4843INTERCHANGEABLE
ADAPTER,CONNECTOR
A202
5998-01-255-9202INTERCHANGEABLE
ELECTRONIC COMPONENTS ASSEMBLY

Frequently Asked Questions

What is NSN 4930-00-789-7874?

NSN 4930-00-789-7874 is a Seal Assembly,pump, manufactured by WS Darley & Co Div Ohler Pump, classified under FSC 4930 (No Item Name Available). Status: active.

What are the part numbers for NSN 4930-00-789-7874?

NSN 4930-00-789-7874 has 1 cross-referenced part number: A202 (WS Darley & Co Div Ohler Pump).

What NSN replaces 4930-00-789-7874?

There are 9 known substitutes for 4930-00-789-7874: 2920-00-239-9047, 6810-00-268-9951, 5305-00-439-9844 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A202?

Key specifications for A202: General Characteristics Item Description: INCLUDES 1EA OF THE FOLLOWING ITEMS,FSCM 00299 D403 RUBBER CUP,D401 CERAMIC SEAT,D402 CARBON FACE,D405 STEEL CUP,D406 RETAINING BAND,D404 DIAPHRAGM,D408 SPRING,FREE O/A LG 2.038 IN,1.200 IN.COMPRESSED LG,FOR 1.000 IN.SHAFT IN. 1 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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