PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

TY-21Seal Assembly,shaft,spring Loade

John Crane, Inc · NSN 4320-01-066-3207 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-066-3207 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-066-3207. Primary manufacturer part number: TY-21.
Features
  • Seal Assembly,shaft,spring Loade — FSC 4320
  • Material: STEEL CORROSION RESISTING
  • Overall Diameter: 1.875 INCHES NOMINAL IN
  • Pressure Rating: ERR-060
  • General Characteristics Item Description: SHAFT 1.250 INS NOM ID; ASSEMBLY INCLUDES MATING RING; GASKET, SEALING RING; DIAPHRAGM, RETAINER, DRIVE RING; SPRING; SPRING HOLDER
  • 5 verified cross-references
  • Primary manufacturer: John Crane, Inc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Mechanical energy storage
  • Vibration dampening
General Description

The Seal Assembly,shaft,spring Loade, cataloged under National Stock Number 4320-01-066-3207, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is John Crane, Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 2 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
NSN4320-01-066-3207
Primary Part NumberTY-21
Item NameSeal Assembly,shaft,spring Loade
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerJohn Crane, Inc
StatusACTIVE
MaterialSTEEL CORROSION RESISTING
Overall Diameter1.875 INCHES NOMINAL IN
Pressure RatingERR-060
General Characteristics Item DescriptionSHAFT 1.250 INS NOM ID; ASSEMBLY INCLUDES MATING RING; GASKET, SEALING RING; DIAPHRAGM, RETAINER, DRIVE RING; SPRING; SPRING HOLDER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5365-00-091-99362866F07 INTERCHANGEABLE
Shim
Terex Usa, Llc Dba Terex Equipment Services
4720-00-192-874421114 INTERCHANGEABLE
Hose,preformed
Whirlpool Corp Dba Whirlpool Corp
2810-00-213-837221114 INTERCHANGEABLE
Plunger,oil Pressur
Renk America Llc Div Renk America
3040-00-580-954821114 INTERCHANGEABLE
Plate,retaining,shaft
Industrial Technologies and Services Llc
5365-00-599-4881 INTERCHANGEABLE
Shim
3120-00-662-649721114 INTERCHANGEABLE
Bearing,washer,thrust
Parker-Hannifin Corporation Dba Control Systems Division
6130-00-900-191621-114 INTERCHANGEABLE
Power Supply
Ducommun Labarge Technologies, Inc Dba Ducommun Labarge Technologies, Inc
5940-00-983-6135 INTERCHANGEABLE
Terminal Board
5935-01-097-968721114 INTERCHANGEABLE
Connector
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
6520-01-176-62276520-01-176-6227 INTERCHANGEABLE
Point Assortment,pulp Canal,dent
Klein, Joe Dental Supplies & Equipment Inc Dba Klein Joe Dental Sups & Eqp I
Cross-Reference Index
Part NumberManufacturer
TY-21 PRIMARY John Crane, Inc (USA)
2CK5-4-9 Federal Pump Corporation (USA)
21 John Crane, Inc (USA)
21 1 1/4 John Crane, Inc (USA)
9 Federal Pump Corporation (USA)
Related Parts
5365-00-091-9936INTERCHANGEABLE
SHIM
2866F07
4720-00-192-8744INTERCHANGEABLE
HOSE,PREFORMED
21114
2810-00-213-8372INTERCHANGEABLE
PLUNGER,OIL PRESSUR
21114
3040-00-580-9548INTERCHANGEABLE
PLATE,RETAINING,SHAFT
21114
5365-00-599-4881INTERCHANGEABLE
SHIM
3120-00-662-6497INTERCHANGEABLE
BEARING,WASHER,THRUST
21114
6130-00-900-1916INTERCHANGEABLE
POWER SUPPLY
21-114
5940-00-983-6135INTERCHANGEABLE
TERMINAL BOARD
5935-01-097-9687INTERCHANGEABLE
CONNECTOR
21114
6520-01-176-6227INTERCHANGEABLE
POINT ASSORTMENT,PULP CANAL,DENT
6520-01-176-6227
2910-01-195-3903INTERCHANGEABLE
SLEEVE,PUMP,FUEL
21114
5970-01-386-3062INTERCHANGEABLE
INSULATOR,BUSHING
21114

Frequently Asked Questions

What is NSN 4320-01-066-3207?

NSN 4320-01-066-3207 is a Seal Assembly,shaft,spring Loade, manufactured by John Crane, Inc, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-01-066-3207?

NSN 4320-01-066-3207 has 5 cross-referenced part numbers: TY-21 (John Crane, Inc), 2CK5-4-9 (Federal Pump Corporation), 21 (John Crane, Inc), 21 1 1/4 (John Crane, Inc), 9 (Federal Pump Corporation).

What NSN replaces 4320-01-066-3207?

There are 12 known substitutes for 4320-01-066-3207: 5365-00-091-9936, 4720-00-192-8744, 2810-00-213-8372 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of TY-21?

Key specifications for TY-21: Overall Length: 1.500 INCHES NOMINAL IN; Material: STEEL CORROSION RESISTING; Overall Diameter: 1.875 INCHES NOMINAL IN; End Item Identification: PUMP, REDUCTION GEAR AND LUBE OIL TRANSFER MODEL 9200 SERIES ONBOARD 270 FT WMEC COAST GUARD VESSELS FT. 6 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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