PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21221Shaft,drive,flexible

Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron · NSN 3040-01-033-7776 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-01-033-7776 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-033-7776. Primary manufacturer part number: 21221.
Features
  • Shaft,drive,flexible — FSC 3040
  • End Overall Length: 0.844 INCHES NOMINAL IN
  • Threaded Securing Hole Quantity: 2
  • Threaded Securing Hole Location: LOCATED 90 DEG APART,0.188 IN. FROM END,THROUGH TO BORE IN
  • Material Document and Classification: QQ-W-401 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,COMP 22,1/2 HARD FED SPEC 2ND MATERIAL RESPONSE SHAFT
  • Cross Section Size and Location: 0.500 INCHES NOMINAL DIAMETER IN
  • Unit Type: WIRE WOUND
  • Material: COPPER ALLOY 510 OR COPPER ALLOY 360 SHAFT
Applications
  • Applications requiring Copper Alloy 510 or Copper Alloy 360 Shaft construction
General Description

The Shaft,drive,flexible, cataloged under National Stock Number 3040-01-033-7776, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron. Government technical data includes 11 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3040-01-033-7776
Primary Part Number21221
Item NameShaft,drive,flexible
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerHalsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
StatusACTIVE
End Overall Length0.844 INCHES NOMINAL IN
Threaded Securing Hole Quantity2
Threaded Securing Hole LocationLOCATED 90 DEG APART,0.188 IN. FROM END,THROUGH TO BORE IN
Material Document and ClassificationQQ-W-401 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,COMP 22,1/2 HARD FED SPEC 2ND MATERIAL RESPONSE SHAFT
Cross Section Size and Location0.500 INCHES NOMINAL DIAMETER IN
Unit TypeWIRE WOUND
MaterialCOPPER ALLOY 510 OR COPPER ALLOY 360 SHAFT
Securing Hole Thread Size8-32
Size Designator0.125 IN. SHAFT,0.250 IN. COUPLER IN
Outside Diameter0.125 INCHES NOMINAL IN
End TypeROUND FEMALE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3120-00-367-179321221 INTERCHANGEABLE
Bearing,sleeve
Industrial Technologies and Services Llc
6685-00-453-7109 INTERCHANGEABLE
Thermocouple,immersion
5315-00-758-731021221 INTERCHANGEABLE
Pin,shoulder,headless
Mason Electric Co. Dba Mason Controls
7510-01-017-6155402444 INTERCHANGEABLE
Ribbon,inking
Telemechanics Inc
5342-01-144-3429531368-3 INTERCHANGEABLE
Clamp Assy,swing
Raytheon Company Dba Raytheon
5305-01-185-7112 INTERCHANGEABLE
Screw,cap,hexagon Head
4810-01-270-235321221 INTERCHANGEABLE
Actuator,electromechanical,rotar
Mark Industries
3450-01-412-643621221 INTERCHANGEABLE
Threading Machine,pipe and Bolt
Curtis-Toledo, Inc.
4820-01-416-457821221-001 INTERCHANGEABLE
Valve,linear,directional Control
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
3040-01-416-595921221-1002-1 INTERCHANGEABLE
Shaft,shouldered
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
402444 Cardion Inc (USA)
153 Dialight Corporation (USA)
21221 PRIMARY Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron (USA)
402444 Aimtron Systems, Llc (USA)
21221 Dialight Corporation (USA)
Related Parts
3120-00-367-1793INTERCHANGEABLE
BEARING,SLEEVE
21221
6685-00-453-7109INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
5315-00-758-7310INTERCHANGEABLE
PIN,SHOULDER,HEADLESS
21221
7510-01-017-6155INTERCHANGEABLE
RIBBON,INKING
402444
5342-01-144-3429INTERCHANGEABLE
CLAMP ASSY,SWING
531368-3
5305-01-185-7112INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
4810-01-270-2353INTERCHANGEABLE
ACTUATOR,ELECTROMECHANICAL,ROTAR
21221
3450-01-412-6436INTERCHANGEABLE
THREADING MACHINE,PIPE AND BOLT
21221
4820-01-416-4578INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
21221-001
3040-01-416-5959INTERCHANGEABLE
SHAFT,SHOULDERED
21221-1002-1
3040-01-416-5961INTERCHANGEABLE
SHAFT,SHOULDERED
21221-1001-1
5133-01-443-3080INTERCHANGEABLE
DRILL,TWIST
21221

Frequently Asked Questions

What is NSN 3040-01-033-7776?

NSN 3040-01-033-7776 is a Shaft,drive,flexible, manufactured by Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-01-033-7776?

NSN 3040-01-033-7776 has 5 cross-referenced part numbers: 402444 (Cardion Inc), 153 (Dialight Corporation), 21221 (Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron), 402444 (Aimtron Systems, Llc), 21221 (Dialight Corporation).

What NSN replaces 3040-01-033-7776?

There are 12 known substitutes for 3040-01-033-7776: 3120-00-367-1793, 6685-00-453-7109, 5315-00-758-7310 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21221?

Key specifications for 21221: End Overall Length: 0.844 INCHES NOMINAL IN; Threaded Securing Hole Quantity: 2; Threaded Securing Hole Location: LOCATED 90 DEG APART,0.188 IN. FROM END,THROUGH TO BORE IN; Material Document and Classification: QQ-W-401 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,COMP 22,1/2 HARD FED SPEC 2ND MATERIAL RESPONSE SHAFT. 12 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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