PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WSK-280Parts Kit,reciprocating Pump

Imtra Corp · NSN 4320-01-407-0993 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-407-0993 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-407-0993. Primary manufacturer part number: WSK-280.
Features
  • Parts Kit,reciprocating Pump — FSC 4320
  • Component Quantity: 2
  • End Item Name: SUMP OIL PUMP
  • End Item Source: 6A840
  • Model Number: MK3
  • Nonsupply Items and Quantities: CUP WASHER 1; PACKING GLAND 1
  • 5 verified cross-references
  • Primary manufacturer: Imtra Corp
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Parts Kit,reciprocating Pump, cataloged under National Stock Number 4320-01-407-0993, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Imtra Corp. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, 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
NSN4320-01-407-0993
Primary Part NumberWSK-280
Item NameParts Kit,reciprocating Pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerImtra Corp
StatusACTIVE
Component Quantity2
End Item NameSUMP OIL PUMP
End Item Source6A840
Model NumberMK3
Nonsupply Items and QuantitiesCUP WASHER 1; PACKING GLAND 1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4730-01-309-9977259-2024-4-6 INTERCHANGEABLE
Elbow,pipe to Tube
Danfoss Power Solutions II, Llc
4730-01-398-85282023-6-8B INTERCHANGEABLE
Elbow,pipe to Tube
Danfoss Power Solutions II, Llc
4730-01-399-10653914579 INTERCHANGEABLE
Adapter,straight,tube to Hose
Cummins Inc.
4720-01-399-1853CF-02 INTERCHANGEABLE
Parts Kit,hose Assembly,nonmetal
Hynautic Inc Div of Sta-Rite Industries Inc
2040-01-399-5793328-6A INTERCHANGEABLE
Connector,thru-Hull
Perko Inc
4820-01-406-0358BBV-38 INTERCHANGEABLE
Valve,ball
Dvcc, Llc
4820-01-406-0360BBV-25 INTERCHANGEABLE
Valve,ball
Dvcc, Llc
4320-01-407-0986 INTERCHANGEABLE
Parts Kit,reciprocating Pump
4320-01-407-0990WS-280B INTERCHANGEABLE
Pump,reciprocating
Imtra Corp
Cross-Reference Index
Part NumberManufacturer
WSK-28 Imtra Corp (USA)
WSK-280 PRIMARY Imtra Corp (USA)
WSK-28 Southern Pacific Corp (USA)
5105293 Naval Sea Systems Command (USA)
WSK-28 White Star Products Ltd (NZL)
Related Parts
4730-01-309-9977INTERCHANGEABLE
ELBOW,PIPE TO TUBE
259-2024-4-6
4730-01-398-8528INTERCHANGEABLE
ELBOW,PIPE TO TUBE
2023-6-8B
4730-01-399-1065INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
3914579
4720-01-399-1853INTERCHANGEABLE
PARTS KIT,HOSE ASSEMBLY,NONMETAL
CF-02
2040-01-399-5793INTERCHANGEABLE
CONNECTOR,THRU-HULL
328-6A
4820-01-406-0358INTERCHANGEABLE
VALVE,BALL
BBV-38
4820-01-406-0360INTERCHANGEABLE
VALVE,BALL
BBV-25
4320-01-407-0986INTERCHANGEABLE
PARTS KIT,RECIPROCATING PUMP
4320-01-407-0990INTERCHANGEABLE
PUMP,RECIPROCATING
WS-280B

Frequently Asked Questions

What is NSN 4320-01-407-0993?

NSN 4320-01-407-0993 is a Parts Kit,reciprocating Pump, manufactured by Imtra Corp, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-01-407-0993?

NSN 4320-01-407-0993 has 5 cross-referenced part numbers: WSK-28 (Imtra Corp), WSK-280 (Imtra Corp), WSK-28 (Southern Pacific Corp), 5105293 (Naval Sea Systems Command), WSK-28 (White Star Products Ltd).

What NSN replaces 4320-01-407-0993?

There are 9 known substitutes for 4320-01-407-0993: 4730-01-309-9977, 4730-01-398-8528, 4730-01-399-1065 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of WSK-280?

Key specifications for WSK-280: Special Features: REPAIR KIT FOR A "FYN" SPRAY SUMP OIL PUMP; End Item Identification: 24FT RIGID INFLATABLE BOAT MK3 FT; Component Quantity: 2; End Item Name: SUMP OIL PUMP. 7 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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