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MK661-12000 — WASHER,SEAL

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

MK661-12000: WASHER,SEAL.

The WASHER,SEAL is a the manufacturer industrial component. Key specifications include special_features: CAGE 1TGK4 IS ONLY A DISTRIBUTOR. MITSUBISHI THE OEM IS IN JAPAN.

OEM CAGE CODE IS UNKNOWN AND WAS NOT PROVIDED., end_item_identification: NIIN 016179405 COMPRESSOR, DIVE TYPE 1. This part is cataloged in the U.S. Government catalog under NSN 5310-01-644-8556, 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
MK661-12000
NSN: 5310-01-644-8556
FSC: 5310 — Nuts and Washers
CAGE: 1TGK4 — MITSUBISHI HEAVY INDUSTRIES AMERICA INC DIV MACHINE TOOL DIVISION (USA)
SPECIFICATIONS
special_featuresCAGE 1TGK4 IS ONLY A DISTRIBUTOR. MITSUBISHI THE OEM IS IN JAPAN. OEM CAGE CODE IS UNKNOWN AND WAS NOT PROVIDED.
end_item_identificationNIIN 016179405 COMPRESSOR, DIVE TYPE 1
NSN5310-01-644-8556
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MK661-12000 · 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
SPECIAL FEATURESCAGE 1TGK4 IS ONLY A DISTRIBUTOR. MITSUBISHI THE OEM IS IN JAPAN. OEM CAGE CODE IS UNKNOWN AND WAS NOT PROVIDED.
END ITEM IDENTIFICATIONNIIN 016179405 COMPRESSOR, DIVE TYPE 1
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MK661-12000?
MK661-12000 is a WASHER,SEAL.
What is the NSN for MK661-12000?
MK661-12000 is cataloged in the U.S. Government catalog under NSN 5310-01-644-8556. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.