PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

30187Stopper,pump

W.w. Grainger, Inc. Div Government Sales Division · NSN 4320-01-281-4443 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-281-4443 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-281-4443. Primary manufacturer part number: 30187.
Features
  • Stopper,pump — FSC 4320
  • General Characteristics Item Description: STEEL
  • 1 verified cross-reference
  • Primary manufacturer: W.w. Grainger, Inc. Div Government Sales Division
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Stopper,pump, cataloged under National Stock Number 4320-01-281-4443, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is W.w. Grainger, Inc. Div Government Sales Division. 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
NSN4320-01-281-4443
Primary Part Number30187
Item NameStopper,pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerW.w. Grainger, Inc. Div Government Sales Division
StatusACTIVE
General Characteristics Item DescriptionSTEEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5310-00-042-6758 INTERCHANGEABLE
Washer,lock
5306-00-208-554630187 INTERCHANGEABLE
Bolt,machine
Dana Corp Spicer Transmission Div
4310-00-332-0209BB55S49077PC187 INTERCHANGEABLE
Follower,cylinder
Naval Ship Systems Command
9340-00-978-2039 INTERCHANGEABLE
Glass,laminated
2910-01-344-57912020-30 INTERCHANGEABLE
Filter Element,fluid
Parker-Hannifin Corporation Dba Racor Division Div Racor Division
4820-01-418-761530187 INTERCHANGEABLE
Valve,safety Relief
Triumph Actuation Systems - Valencia, Inc. Dba Triumph Actuation Systems - Valencia Inc Div Triumph Actuation Systems-Val
5985-01-438-850930187 INTERCHANGEABLE
Attenuator,fixed
Caes Systems Llc
4820-01-506-9068330187-010NM INTERCHANGEABLE
Disk,valve
Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris
8465-01-688-851130187 INTERCHANGEABLE
Bag,weapon Equipment,carrier
Charles Reed Knight Jr Dba Knight's Armament Company
Cross-Reference Index
Part NumberManufacturer
30187 PRIMARY W.w. Grainger, Inc. Div Government Sales Division (USA)
Related Parts
5310-00-042-6758INTERCHANGEABLE
WASHER,LOCK
5306-00-208-5546INTERCHANGEABLE
BOLT,MACHINE
30187
4310-00-332-0209INTERCHANGEABLE
FOLLOWER,CYLINDER
BB55S49077PC187
9340-00-978-2039INTERCHANGEABLE
GLASS,LAMINATED
2910-01-344-5791INTERCHANGEABLE
FILTER ELEMENT,FLUID
2020-30
4820-01-418-7615INTERCHANGEABLE
VALVE,SAFETY RELIEF
30187
5985-01-438-8509INTERCHANGEABLE
ATTENUATOR,FIXED
30187
4820-01-506-9068INTERCHANGEABLE
DISK,VALVE
330187-010NM
8465-01-688-8511INTERCHANGEABLE
BAG,WEAPON EQUIPMENT,CARRIER
30187

Frequently Asked Questions

What is NSN 4320-01-281-4443?

NSN 4320-01-281-4443 is a Stopper,pump, manufactured by W.w. Grainger, Inc. Div Government Sales Division, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-01-281-4443?

NSN 4320-01-281-4443 has 1 cross-referenced part number: 30187 (W.w. Grainger, Inc. Div Government Sales Division).

What NSN replaces 4320-01-281-4443?

There are 9 known substitutes for 4320-01-281-4443: 5310-00-042-6758, 5306-00-208-5546, 4310-00-332-0209 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 30187?

Key specifications for 30187: General Characteristics Item Description: STEEL. 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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