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Technical Data Sheet
PartsTable / OPTICAL_TAPE / 1221-181-76V
1221-181-76V ✓ Verified by PartsTable
— · OPTICAL_TAPE · LTO_TAPE
WHAT YOU NEED TO KNOW
LTO generations NOT backward compatible for writing (2 gen back for read) SAS and FC interface options — match to existing infrastructure
LTO-8 cannot write to LTO-6 tapes (only read LTO-7 and LTO-8)
PRODUCT OVERVIEW

LTO-4 Tape-Imation-Certified Error Free. Key specifications include material: STEEL, power_source: EXTERNAL, movement_type: MOVING COIL, PERMANENT MAGNET, overall_width: 2.000 INCHES NOMINAL IN, pointer_color: BLACK SINGLE INDICATOR SINGLE RANGE, indicator_type: DIAL W/POINTER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-01-106-4159, 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
OPTICAL_TAPE→ LTO_TAPE→ 1221-181-76V
NSN: 6625-01-106-4159
FSC: 6625
CAGE: 77221 — PHAOSTRON INSTRUMENT AND ELECTRONIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL
power_sourceEXTERNAL
movement_typeMOVING COIL, PERMANENT MAGNET
overall_width2.000 INCHES NOMINAL IN
pointer_colorBLACK SINGLE INDICATOR SINGLE RANGE
indicator_typeDIAL W/POINTER
overall_height1.060 INCHES NOMINAL IN
overall_length2.500 INCHES NOMINAL IN
style_designatorRECTANGULAR SURFACE MTG
features_providedZERO ADJUSTER
measurement_range+0.0 TO 10.0 VOLTS, DC SINGLE INDICATOR SINGLE RANGE
sensitivity_rating1.0 MILLIAMPERES
NSN6625-01-106-4159
COMPONENT DIAGRAM
MEDIA SLOT RDY ACT CLN SAS CONNECTOR 1221-181-76V EJECT HALF-HEIGHT 5.25" LTO GEN GUIDE LTO-9: 18TB / 45TB comp LTO-8: 12TB / 30TB comp LTO-7: 6TB / 15TB comp LTO-6: 2.5TB / 6.25TB LTO-5: 1.5TB / 3TB comp THIS: LTO-8 12TB / 30TB / 360MB/s LTO-8 TAPE DRIVE | SAS | 12TB native Half-height 5.25" | 360MB/s | 30TB compressed TITLE TAPE DRIVE PN 1221-181-76V MFR LTO-4 Tape-Imation-Certified Error Free
KEY FEATURES
•
NUCLEAR HARDNESS CRITICAL FEATURE: NONHARDENED
•
MOUNTING HOLE DIAMETER: 0.112 INCHES NOMINAL IN
•
POWER SOURCE: EXTERNAL
•
CIRCUIT ATTACHMENT METHOD AND QUANTITY: 2 THREADED STUD
•
INDICATOR TYPE: DIAL W/POINTER
•
MEASUREMENT RANGE: +0.0 TO 10.0 VOLTS, DC SINGLE INDICATOR SINGLE RANGE
•
MOVEMENT SUSPENSION METHOD: JEWEL PIVOT BASE
•
DISTANCE BETWEEN MOUNTING FACILITY CENTERS: 1.125 INCHES NOMINAL IN
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
NUCLEAR HARDNESS CRITICAL FEATURENONHARDENED
MOUNTING HOLE DIAMETER0.112 INCHES NOMINAL IN
POWER SOURCEEXTERNAL
CIRCUIT ATTACHMENT METHOD AND QUANTITY2 THREADED STUD
INDICATOR TYPEDIAL W/POINTER
MEASUREMENT RANGE+0.0 TO 10.0 VOLTS, DC SINGLE INDICATOR SINGLE RANGE
MOVEMENT SUSPENSION METHODJEWEL PIVOT BASE
DISTANCE BETWEEN MOUNTING FACILITY CENTERS1.125 INCHES NOMINAL IN
MOUNTING ARRANGEMENT STYLETWO HOLE/STUD
FURNISHED ITEMS AND QUANTITYNUT 4: WASHER 4
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
M3110Interchangeable
interchangeable cross-reference
interchangeable
26592Interchangeable
interchangeable cross-reference
interchangeable
1221Interchangeable
interchangeable cross-reference
interchangeable
215-509Interchangeable
interchangeable cross-reference
interchangeable
E3SPInterchangeable
interchangeable cross-reference
interchangeable
026592Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1221-181-76V?
1221-181-76V is a LTO-4 Tape-Imation-Certified Error Free. It is classified as a OPTICAL_TAPE (LTO_TAPE).
What parts can replace 1221-181-76V?
There are 14 known substitutes for 1221-181-76V: M3110, 26592, 1221 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1221-181-76V?
1221-181-76V is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-01-106-4159. 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