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Technical Data Sheet
PartsTable / COMPONENT / 51921-1
51921-1 ✓ 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 PRINTED WIRING BOARD is a the manufacturer industrial component. Key specifications include material: STEEL COMP E50100 OR STEEL COMP E51100 OR STEEL COMP E52100 OVERALL, overall_length: 0.7300 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN, style_designator: NEEDLE ROLLER, SPHERICAL ENDS, rolling_element_diameter: 0.1248 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN, material_document_and_classification: 66,AISI/SAE E50100,E51100 OR E52100 FED STD SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2840-00-116-1343, 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
51921-1
NSN: 2840-00-116-1343
FSC: 2840
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP E50100 OR STEEL COMP E51100 OR STEEL COMP E52100 OVERALL
overall_length0.7300 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
style_designatorNEEDLE ROLLER, SPHERICAL ENDS
rolling_element_diameter0.1248 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN
material_document_and_classification66,AISI/SAE E50100,E51100 OR E52100 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN2840-00-116-1343
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available PRINTED WIRING BOARD TITLE COMPONENT PN 51921-1 MFR PRINTED WIRING BOARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
51921-1Interchangeable
interchangeable cross-reference
interchangeable
MIL-C-25/4Interchangeable
interchangeable cross-reference
interchangeable
640463Interchangeable
interchangeable cross-reference
interchangeable
MILC25C3-4C1CP55B1EFInterchangeable
interchangeable cross-reference
interchangeable
A144Interchangeable
interchangeable cross-reference
interchangeable
601397Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51921-1?
51921-1 is a PRINTED WIRING BOARD.
What parts can replace 51921-1?
There are 7 known substitutes for 51921-1: 51921-1, MIL-C-25/4, 640463 and 4 more. Substitute compatibility should be verified for your specific system.
Is 51921-1 still available?
51921-1 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