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PartsTable / COMPONENT / MC33-52 ITEM 21
MC33-52 ITEM 21 ✓ 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 MC33-52 ITEM 21 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6685-01-553-5851, 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
MC33-52 ITEM 21
NSN: 6685-01-553-5851
FSC: 6685
CAGE: 91816 — CIRCOR AEROSPACE, INC. DBA CIRCOR AEROSPACE INC (USA)
SPECIFICATIONS
Part NumberMC33-52 ITEM 21
NSN6685-01-553-5851
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available MC33-52 ITEM 21 TITLE COMPONENT PN MC33-52 ITEM 21 MFR MC33-52 ITEM 21
KEY FEATURES
•
LENGTH: 1.900 INCHES NOMINAL IN
•
MOUNTING FACILITY TYPE AND QUANTITY: 1 THREADED STUD(S)
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESDIFFERENTIAL PRESSURE INDICATOR, HAVING VISUAL POP-UP INDICATION; 3/4-16 THREADING
PART NAME ASSIGNED BY CONTROLLING AGENCY(INAVY) DIFFERENTIAL PRESSURE INDICATOR
LENGTH1.900 INCHES NOMINAL IN
END ITEM IDENTIFICATIONMC33-52 (LATORAL COMBAT SHIP)
MOUNTING FACILITY TYPE AND QUANTITY1 THREADED STUD(S)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
608-921-010Interchangeable
interchangeable cross-reference
interchangeable
608-921-010-000Interchangeable
interchangeable cross-reference
interchangeable
608-921-010-603Interchangeable
interchangeable cross-reference
interchangeable
BT772BInterchangeable
interchangeable cross-reference
interchangeable
772BInterchangeable
interchangeable cross-reference
interchangeable
42880Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MC33-52 ITEM 21?
MC33-52 ITEM 21 is a MC33-52 ITEM 21.
What parts can replace MC33-52 ITEM 21?
There are 14 known substitutes for MC33-52 ITEM 21: 608-921-010, 608-921-010-000, 608-921-010-603 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MC33-52 ITEM 21?
MC33-52 ITEM 21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6685-01-553-5851. 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