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Technical Data Sheet
PartsTable / MRO / C42121Z21C4
C42121Z21C4 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
SAS cables have specific lane counts: 4i (internal) or 4e (external) Cable length matters — too short won't reach, too long creates clutter
Verify connector type on BOTH ends — many SAS cables are asymmetric
PRODUCT OVERVIEW

The C42121Z21C4 is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, overall_height: 0.172 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN, overall_diameter: 0.275 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN, surface_treatment: OXIDE, unthreaded_mounting_hole_diameter: 0.240 INCHES MINIMUM AND 0.265 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN, mounting_facility_type_and_quantity: 1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-01-033-5474, 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→ C42121Z21C4
NSN: 5999-01-033-5474
FSC: 5999
CAGE: C0426 — HENSOLDT SENSORS GMBH (DEU)
SPECIFICATIONS
materialCOPPER ALLOY
overall_height0.172 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN
overall_diameter0.275 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
surface_treatmentOXIDE
unthreaded_mounting_hole_diameter0.240 INCHES MINIMUM AND 0.265 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN
mounting_facility_type_and_quantity1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
material_document_and_classificationMIL-C-81021 MIL SPEC SINGLE MATERIAL RESPONSE
surface_treatment_document_and_classificationMIL-F-495 MIL SPEC SINGLE TREATMENT RESPONSE
NSN5999-01-033-5474
COMPONENT DIAGRAM
CONN A SFF-8482 CONN B SFF-8087 LENGTH: SAS CABLE ASSEMBLY | SFF-8482 to SFF-8087 Cable length: | SAS | Shielded TITLE CABLE ASSY PN C42121Z21C4 MFR C42121Z21C4
KEY FEATURES
•
MATERIAL: COPPER ALLOY
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-495 MIL SPEC SINGLE TREATMENT RESPONSE
•
MOUNTING FACILITY TYPE AND QUANTITY: 1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
•
UNTHREADED MOUNTING HOLE DIAMETER: 0.240 INCHES MINIMUM AND 0.265 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-81021 MIL SPEC SINGLE MATERIAL RESPONSE
•
SURFACE TREATMENT: OXIDE
•
OVERALL DIAMETER: 0.275 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-495 MIL SPEC SINGLE TREATMENT RESPONSE
MOUNTING FACILITY TYPE AND QUANTITY1 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
UNTHREADED MOUNTING HOLE DIAMETER0.240 INCHES MINIMUM AND 0.265 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-81021 MIL SPEC SINGLE MATERIAL RESPONSE
SURFACE TREATMENTOXIDE
OVERALL HEIGHT0.172 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN
OVERALL DIAMETER0.275 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-495 MIL SPEC SINGLE TREATMENT RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
259869-1Upgraded Successor
successor cross-reference
successor
205CBUpgraded Successor
successor cross-reference
successor
371095-1Interchangeable
interchangeable cross-reference
interchangeable
205SBInterchangeable
interchangeable cross-reference
interchangeable
12007134Interchangeable
interchangeable cross-reference
interchangeable
0N501017Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C42121Z21C4?
C42121Z21C4 is a C42121Z21C4. It is classified as a MRO (MRO_GENERAL).
What parts can replace C42121Z21C4?
There are 13 known substitutes for C42121Z21C4: 259869-1, 205CB, 371095-1 and 10 more. Substitute compatibility should be verified for your specific system.
Is C42121Z21C4 still available?
C42121Z21C4 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