PartsTable
Technical Data Sheet
PartsTable / MRO / 21991
21991 ✓ 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

RESISTOR,VARIABLE,WIRE WOUND,NON. Key specifications include shaft_type: ROUND, FLATTED SINGLE ACTUATOR, flat_height: 0.200 INCHES NOMINAL SINGLE ACTUATOR IN, shaft_length: 0.500 INCHES NOMINAL SINGLE ACTUATOR IN, thread_class: 2A SINGLE MOUNTING FACILITY A, overall_width: 1.625 INCHES NOMINAL IN, pole_quantity: 4 SINGLE SECTION REAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-087-7799, 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→ 21991
NSN: 5998-01-087-7799
FSC: 5998 — CIRCUIT CARD ASSEMBLY
CAGE: 95411 — MEGGITT (ORANGE COUNTY), INC. (USA)
SPECIFICATIONS
shaft_typeROUND, FLATTED SINGLE ACTUATOR
flat_height0.200 INCHES NOMINAL SINGLE ACTUATOR IN
shaft_length0.500 INCHES NOMINAL SINGLE ACTUATOR IN
thread_class2A SINGLE MOUNTING FACILITY A
overall_width1.625 INCHES NOMINAL IN
pole_quantity4 SINGLE SECTION REAR
terminal_typeTAB, SOLDER LUG
thread_length0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
overall_height1.875 INCHES NOMINAL IN
overall_length1.500 INCHES NOMINAL IN
shaft_diameter0.250 INCHES NOMINAL SINGLE ACTUATOR IN
throw_quantity2 SINGLE SECTION REAR
NSN5998-01-087-7799
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 21991 MFR RESISTOR,VARIABLE,WIRE WOUND,NON
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESPRINTED WIRING BOARD 1,CAPACITOR 1,DIODE 7,DISPLAY 4,RESISTOR 7,MICROCIRCUIT 6
SPECIAL FEATURESPRINTED WIRING BOARD 1,CAPACITOR 1,DIODE 7,DISPLAY 4,RESISTOR 7,MICROCIRCUIT 6
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
A326254Interchangeable
interchangeable cross-reference
interchangeable
2-199-1Interchangeable
interchangeable cross-reference
interchangeable
12226Interchangeable
interchangeable cross-reference
interchangeable
219.91Interchangeable
interchangeable cross-reference
interchangeable
4831 ITEM 15Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21991?
21991 is a RESISTOR,VARIABLE,WIRE WOUND,NON. It is classified as a MRO (MRO_GENERAL).
What parts can replace 21991?
There are 5 known substitutes for 21991: A326254, 2-199-1, 12226 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21991?
21991 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5998-01-087-7799. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026