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Technical Data Sheet
PartsTable / MRO / 21-817
21-817 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

The RETAINER,ELECTRICAL SWITCH is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024, end_style: REDUCED LOOP END FIRST END, body_width: 0.100 INCHES NOMINAL IN, body_height: 0.215 INCHES NOMINAL IN, body_length: 0.200 INCHES NOMINAL IN, hook_radius: 0.125 INCHES NOMINAL BOTH ENDS IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-109-1157, 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
MRO→ MRO_GENERAL→ 21-817
NSN: 3110-00-109-1157
FSC: 3110
CAGE: 99167 — HAMILTON SUNDSTRAND CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024
end_styleREDUCED LOOP END FIRST END
body_width0.100 INCHES NOMINAL IN
body_height0.215 INCHES NOMINAL IN
body_length0.200 INCHES NOMINAL IN
hook_radius0.125 INCHES NOMINAL BOTH ENDS IN
coil_quantity7
overall_width0.410 INCHES NOMINAL IN
rating_methodELECTRICAL SINGLE COMPONENT SINGLE WINDING
coil_form_typeSOLID SINGLE COMPONENT
inclosure_typeFULLY INCLOSED
overall_length0.950 INCHES NOMINAL IN
NSN3110-00-109-1157
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 21-817 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
PEF90S/4P-12Interchangeable
interchangeable cross-reference
interchangeable
Z128Interchangeable
interchangeable cross-reference
interchangeable
25G227Interchangeable
interchangeable cross-reference
interchangeable
F20T12/CWInterchangeable
interchangeable cross-reference
interchangeable
220-0099Interchangeable
interchangeable cross-reference
interchangeable
F20T12/CW-SKInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21-817?
21-817 is a RETAINER,ELECTRICAL SWITCH. It is classified as a MRO (MRO_GENERAL).
What parts can replace 21-817?
There are 26 known substitutes for 21-817: PEF90S/4P-12, Z128, 25G227 and 23 more. Substitute compatibility should be verified for your specific system.
Is 21-817 still available?
21-817 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026