PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21218Coupling,shaft,flexible

Rexnord Industries, Llc Div Couplings Division · NSN 3010-00-919-5233 · FSC 3010 · No Item Name Available
Verified by PartsTable
NSN 3010-00-919-5233 — this item is cataloged by the U.S. Government under National Stock Number 3010-00-919-5233. Primary manufacturer part number: 21218.
Features
  • Coupling,shaft,flexible — FSC 3010
  • Keying Facility Type: KEYWAY BOTH ENDS
  • Width: 4.594 INCHES NOMINAL IN
  • Features Provided: KEYWAY AND EXPOSED COUPLING BOLT TYPE
  • Securing Method: KEY BOTH ENDS
  • Keyway Depth: 0.2500 INCHES NOMINAL BOTH ENDS IN
  • Bore Length: 1.6880 INCHES NOMINAL BOTH ENDS IN
  • Bore Diameter: 1.8750 INCHES NOMINAL BOTH ENDS IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Coupling,shaft,flexible, cataloged under National Stock Number 3010-00-919-5233, is classified within Federal Supply Class 3010 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Rexnord Industries, Llc Div Couplings Division. Government technical data includes 12 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: Cancelled.

Technical Specifications
ParameterValue
NSN3010-00-919-5233
Primary Part Number21218
Item NameCoupling,shaft,flexible
FSC / FSG3010 / 30 — No Item Name Available
ManufacturerRexnord Industries, Llc Div Couplings Division
StatusCANCELLED
Keying Facility TypeKEYWAY BOTH ENDS
Width4.594 INCHES NOMINAL IN
Features ProvidedKEYWAY AND EXPOSED COUPLING BOLT TYPE
Securing MethodKEY BOTH ENDS
Keyway Depth0.2500 INCHES NOMINAL BOTH ENDS IN
Bore Length1.6880 INCHES NOMINAL BOTH ENDS IN
Bore Diameter1.8750 INCHES NOMINAL BOTH ENDS IN
Keying Facility Quantity1 BOTH ENDS
Keyway Width0.500 INCHES NOMINAL BOTH ENDS IN
Keying Facility Spacing in Deg360.0 BOTH ENDS
Bore ShapeSTRAIGHT BOTH ENDS
Design TypeDISK
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3110-00-120-42091B3843 INTERCHANGEABLE
Roller,bearing
Caterpillar Inc Div Caterpillar Defense
5330-00-214-644650559 INTERCHANGEABLE
Gasket
Hamilton Sundstrand Corporation Dba Collins Aerospace
5310-00-221-4915SCB70002 INTERCHANGEABLE
Nut,plain,hexagon
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
3455-00-222-4063 INTERCHANGEABLE
File,rotary
5120-00-240-7308129 INTERCHANGEABLE
Block,bench,mechanic's
L.s. Starrett Company (the) Div Tool Division
3010-00-294-7731 INTERCHANGEABLE
Coupling,shaft,flexible
5330-00-297-988921218 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
5930-00-496-4580 INTERCHANGEABLE
Switch,toggle
5360-00-612-1510 INTERCHANGEABLE
Spring,helical,compression
5360-00-675-924815486 INTERCHANGEABLE
Spring,helical,extension
Cadillac Gage Textron Inc.
Cross-Reference Index
Part NumberManufacturer
21218 Rexnord Industries, Llc Div Couplings Division (USA)
26489 Rexnord Industries, Llc Div Couplings Division (USA)
B50559 Keco Industries, Inc. (USA)
50559 Keco Industries, Inc. (USA)
162MT Rexnord Industries, Llc Div Couplings Division (USA)
Related Parts
3110-00-120-4209INTERCHANGEABLE
ROLLER,BEARING
1B3843
5330-00-214-6446INTERCHANGEABLE
GASKET
50559
5310-00-221-4915INTERCHANGEABLE
NUT,PLAIN,HEXAGON
SCB70002
3455-00-222-4063INTERCHANGEABLE
FILE,ROTARY
5120-00-240-7308INTERCHANGEABLE
BLOCK,BENCH,MECHANIC'S
129
3010-00-294-7731INTERCHANGEABLE
COUPLING,SHAFT,FLEXIBLE
5330-00-297-9889INTERCHANGEABLE
SEAL,PLAIN ENCASED
21218
5930-00-496-4580INTERCHANGEABLE
SWITCH,TOGGLE
5360-00-612-1510INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5360-00-675-9248INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
15486
5355-00-687-2931INTERCHANGEABLE
DIAL,CONTROL
50559
5950-00-706-9443INTERCHANGEABLE
REACTOR

Frequently Asked Questions

What is NSN 3010-00-919-5233?

NSN 3010-00-919-5233 is a Coupling,shaft,flexible, manufactured by Rexnord Industries, Llc Div Couplings Division, classified under FSC 3010 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3010-00-919-5233?

NSN 3010-00-919-5233 has 5 cross-referenced part numbers: 21218 (Rexnord Industries, Llc Div Couplings Division), 26489 (Rexnord Industries, Llc Div Couplings Division), B50559 (Keco Industries, Inc.), 50559 (Keco Industries, Inc.), 162MT (Rexnord Industries, Llc Div Couplings Division).

What NSN replaces 3010-00-919-5233?

There are 12 known substitutes for 3010-00-919-5233: 3110-00-120-4209, 5330-00-214-6446, 5310-00-221-4915 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21218?

Key specifications for 21218: Overall Length: 4.312 INCHES NOMINAL IN; Keying Facility Type: KEYWAY BOTH ENDS; Width: 4.594 INCHES NOMINAL IN; Features Provided: KEYWAY AND EXPOSED COUPLING BOLT TYPE. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3010-00-919-5233 still in active supply?

NSN 3010-00-919-5233 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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