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PartsTable / COMPONENT / CB27661-001
CB27661-001 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: WASHER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-734-6180, 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
CB27661-001
NSN: 5310-01-734-6180
FSC: 5310
CAGE: 07270 — MOOG INC. DBA AMPAC-ISP CORP (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyWASHER
NSN5310-01-734-6180
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: CB27661-001 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
698414Interchangeable
interchangeable cross-reference
interchangeable
663643Interchangeable
interchangeable cross-reference
interchangeable
31590Interchangeable
interchangeable cross-reference
interchangeable
300SH88TP4Interchangeable
interchangeable cross-reference
interchangeable
31591 W/O MAGNETIC BASEInterchangeable
interchangeable cross-reference
interchangeable
725658Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CB27661-001?
CB27661-001 is a WASHER,FLAT.
What parts can replace CB27661-001?
There are 9 known substitutes for CB27661-001: 698414, 663643, 31590 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for CB27661-001?
CB27661-001 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-734-6180. 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