PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40121Bulb,flush,water Closet Tank

Danco Inc · NSN 4510-00-595-0923 · FSC 4510 · No Item Name Available
Verified by PartsTable
NSN 4510-00-595-0923 — this item is cataloged by the U.S. Government under National Stock Number 4510-00-595-0923. Primary manufacturer part number: 40121.
Features
  • Bulb,flush,water Closet Tank — FSC 4510
  • Diameter: 2.50 INCHES NOMINAL IN
  • Material: RUBBER
  • 4 verified cross-references
  • Primary manufacturer: Danco Inc
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
  • Applications requiring Rubber construction
General Description

The Bulb,flush,water Closet Tank, cataloged under National Stock Number 4510-00-595-0923, is classified within Federal Supply Class 4510 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Danco Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4510-00-595-0923
Primary Part Number40121
Item NameBulb,flush,water Closet Tank
FSC / FSG4510 / 45 — No Item Name Available
ManufacturerDanco Inc
StatusACTIVE
Diameter2.50 INCHES NOMINAL IN
MaterialRUBBER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5110-00-156-0124 INTERCHANGEABLE
File,hand
3455-00-194-051510000 INTERCHANGEABLE
Cutter,milling,plain
Niagara Cutter Inc
4510-00-202-7366PP835-6 INTERCHANGEABLE
Lever Assembly,water Closet Tank
Keeney Mfg Co
4510-00-273-1248 INTERCHANGEABLE
Rod,lift,flush Bulb
4510-00-273-1250 INTERCHANGEABLE
Rod,actuating,flush Bulb
3120-00-661-780740121 INTERCHANGEABLE
Bushing,sleeve
Northrop Grumman Systems Corporation Div Marine Systems
5305-00-807-644640121 INTERCHANGEABLE
Screw,wood
Hillman Group, Inc., the
5330-00-998-3230648195 INTERCHANGEABLE
Gasket
Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division
4210-01-080-1457 INTERCHANGEABLE
Coupling,hose,fire Fighting
6685-01-155-3061 INTERCHANGEABLE
Transmitter,temperature,electric
Cross-Reference Index
Part NumberManufacturer
A-A-2820-06 General Services Administration Federal Supply Service (USA)
40121 PRIMARY Danco Inc (USA)
WW-V-001916 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
A-A-2820 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
Related Parts
5110-00-156-0124INTERCHANGEABLE
FILE,HAND
3455-00-194-0515INTERCHANGEABLE
CUTTER,MILLING,PLAIN
10000
4510-00-202-7366INTERCHANGEABLE
LEVER ASSEMBLY,WATER CLOSET TANK
PP835-6
4510-00-273-1248INTERCHANGEABLE
ROD,LIFT,FLUSH BULB
4510-00-273-1250INTERCHANGEABLE
ROD,ACTUATING,FLUSH BULB
3120-00-661-7807INTERCHANGEABLE
BUSHING,SLEEVE
40121
5305-00-807-6446INTERCHANGEABLE
SCREW,WOOD
40121
5330-00-998-3230INTERCHANGEABLE
GASKET
648195
4210-01-080-1457INTERCHANGEABLE
COUPLING,HOSE,FIRE FIGHTING
6685-01-155-3061INTERCHANGEABLE
TRANSMITTER,TEMPERATURE,ELECTRIC
5995-01-309-4508INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
40121
3040-01-347-2831INTERCHANGEABLE
SHAFT,SHOULDERED
40121

Frequently Asked Questions

What is NSN 4510-00-595-0923?

NSN 4510-00-595-0923 is a Bulb,flush,water Closet Tank, manufactured by Danco Inc, classified under FSC 4510 (No Item Name Available). Status: active.

What are the part numbers for NSN 4510-00-595-0923?

NSN 4510-00-595-0923 has 4 cross-referenced part numbers: A-A-2820-06 (General Services Administration Federal Supply Service), 40121 (Danco Inc), WW-V-001916 (Federal Specifications Promulgated by General Services Administration Washington DC), A-A-2820 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC).

What NSN replaces 4510-00-595-0923?

There are 12 known substitutes for 4510-00-595-0923: 5110-00-156-0124, 3455-00-194-0515, 4510-00-202-7366 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40121?

Key specifications for 40121: Special Features: SEMI-SPHERICAL SHAPED BALL; 2.375 INCH LONG; 0.138-32 UNC-2B INTERNALLY THREADED COPPER ALLOY INSERT TO RECEIVE LIFT ROD; THREADS 0.375 INCH LONG IN; Diameter: 2.50 INCHES NOMINAL IN; Material: RUBBER. 3 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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