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PartsTable / COMPONENT / M1521-1-2
M1521-1-2 ✓ 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 M1521-1-2 is a the manufacturer industrial component. Key specifications include color: BLACK, width: 1.625 INCHES NOMINAL IN, skirt_style: FLARED, skirt_design: NONDETACHABLE, overall_depth: 0.641 INCHES NOMINAL IN, inside_diameter: 0.250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5355-00-160-6099, 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
M1521-1-2
NSN: 5355-00-160-6099
FSC: 5355
CAGE: 82692 — MACKAY COMMUNICATIONS, INC (USA)
SPECIFICATIONS
colorBLACK
width1.625 INCHES NOMINAL IN
skirt_styleFLARED
skirt_designNONDETACHABLE
overall_depth0.641 INCHES NOMINAL IN
inside_diameter0.250 INCHES NOMINAL IN
screw_drive_typeSLOT
style_designatorFLUTED FOILS
attachment_methodSETSCREWS
overall_thickness0.875 INCHES NOMINAL IN
reference_markingSINGLE LINE
nominal_thread_size0.164 INCHES SCREW HOLE IN
NSN5355-00-160-6099
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available M1521-1-2 TITLE COMPONENT PN M1521-1-2 MFR M1521-1-2
KEY FEATURES
•
REFERENCE MARKING: SINGLE LINE
•
DISTANCE FROM HOLE CENTER TO KNOB/SKIRT BASE: 0.375 INCHES NOMINAL IN
•
GRIPPING SURFACE CONDITION: GRIP AID
•
SCREW DRIVE TYPE: SLOT
•
ATTACHMENT METHOD: SETSCREWS
•
OVERALL THICKNESS: 0.875 INCHES NOMINAL IN
•
SKIRT OUTSIDE DIAMETER: 2.062 INCHES NOMINAL IN
•
COLOR: BLACK
TECHNICAL CHARACTERISTICS (FLIS)
REFERENCE MARKINGSINGLE LINE
DISTANCE FROM HOLE CENTER TO KNOB/SKIRT BASE0.375 INCHES NOMINAL IN
GRIPPING SURFACE CONDITIONGRIP AID
SCREW DRIVE TYPESLOT
ATTACHMENT METHODSETSCREWS
OVERALL THICKNESS0.875 INCHES NOMINAL IN
SKIRT OUTSIDE DIAMETER2.062 INCHES NOMINAL IN
COLORBLACK
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SCREW HOLE
STYLE DESIGNATORFLUTED FOILS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
MS91531-1F1BInterchangeable
interchangeable cross-reference
interchangeable
NASM91531Interchangeable
interchangeable cross-reference
interchangeable
PT873Interchangeable
interchangeable cross-reference
interchangeable
FFB187/01-642Interchangeable
interchangeable cross-reference
interchangeable
25Z259D26Interchangeable
interchangeable cross-reference
interchangeable
30-0023Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M1521-1-2?
M1521-1-2 is a M1521-1-2.
What parts can replace M1521-1-2?
There are 30 known substitutes for M1521-1-2: MS91531-1F1B, NASM91531, PT873 and 27 more. Substitute compatibility should be verified for your specific system.
Is M1521-1-2 still available?
M1521-1-2 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