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Technical Data Sheet
R21-44 ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The SHAFT ASSEMBLY,FLEXIBLE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, body_style: PLAIN, SOLID, bore_style: PLAIN BOTH ENDS, tooth_form: STANDARD, pitch_diameter: 0.9157 INCHES MINIMUM AND 0.9167 INCHES MAXIMUM IN, pressure_angle: 20.0000 DEGREES. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3020-00-778-9705, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
R21-44
NSN: 3020-00-778-9705
FSC: 3020
CAGE: 00328 — DESIGNATRONICS INCORPORATED DIV STERLING INSTRUMENTS DIV (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
body_stylePLAIN, SOLID
bore_stylePLAIN BOTH ENDS
tooth_formSTANDARD
pitch_diameter0.9157 INCHES MINIMUM AND 0.9167 INCHES MAXIMUM IN
pressure_angle20.0000 DEGREES
teeth_quantity44
style_designatorPROTRUDING HUB
attachment_methodCLAMP
surface_treatmentPASSIVATE OVERALL
face_nominal_width0.125 INCHES IN
hub_nominal_diameter0.312 INCHES FIRST END IN
NSN3020-00-778-9705
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SHAFT ASSEMBLY,FLEXIBLE TITLE COMPONENT PN R21-44 MFR SHAFT ASSEMBLY,FLEXIBL
KEY FEATURES
BORE NOMINAL DIAMETER: 0.250 INCHES BOTH ENDS IN
HUB NOMINAL DIAMETER: 0.312 INCHES FIRST END IN
TOOTH FORM: STANDARD
CLAMPING SURFACE NOMINAL LENGTH: 0.250 INCHES FIRST END IN
STYLE DESIGNATOR: PROTRUDING HUB
NOMINAL OUTSIDE DIAMETER: 0.958 INCHES IN
SURFACE TREATMENT: PASSIVATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764,TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
BORE NOMINAL DIAMETER0.250 INCHES BOTH ENDS IN
HUB NOMINAL DIAMETER0.312 INCHES FIRST END IN
TOOTH FORMSTANDARD
CLAMPING SURFACE NOMINAL LENGTH0.250 INCHES FIRST END IN
STYLE DESIGNATORPROTRUDING HUB
NOMINAL OUTSIDE DIAMETER0.958 INCHES IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764,TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
BODY STYLEPLAIN, SOLID
BORE STYLEPLAIN BOTH ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
H144Interchangeable
interchangeable cross-reference
interchangeable
42A38072Interchangeable
interchangeable cross-reference
interchangeable
W-C-440 TYPE PCInterchangeable
interchangeable cross-reference
interchangeable
682-2-1169Interchangeable
interchangeable cross-reference
interchangeable
11602434Interchangeable
interchangeable cross-reference
interchangeable
743870-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R21-44?
R21-44 is a SHAFT ASSEMBLY,FLEXIBLE.
What parts can replace R21-44?
There are 8 known substitutes for R21-44: H144, 42A38072, W-C-440 TYPE PC and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R21-44?
R21-44 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3020-00-778-9705. This indicates validated use in U.S. government and defense supply chains.
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