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CD557611 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

CD557611: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include special_features: M16 METRIC 8.8 HEX NUTS, NUT, HEX, NA, UNITS PER PK = 25, BD ITEM CD557611., special_test_features: TYPE OF FINISH IS NOT AVAILABLE, end_item_identification: BUFFALO, part_name_assigned_by_controlling_agency: NUT,PLAIN,HEXAGON. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-561-6509, 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
CD557611
NSN: 5310-01-561-6509
FSC: 5310 — Nuts and Washers
CAGE: 05573 — BARNES GROUP INC. DBA BARNES DISTRIBUTION (USA)
SPECIFICATIONS
special_featuresM16 METRIC 8.8 HEX NUTS, NUT, HEX, NA, UNITS PER PK = 25, BD ITEM CD557611.
special_test_featuresTYPE OF FINISH IS NOT AVAILABLE
end_item_identificationBUFFALO
part_name_assigned_by_controlling_agencyNUT,PLAIN,HEXAGON
NSN5310-01-561-6509
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: CD557611 · 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
KEY FEATURES
•
SPECIAL TEST FEATURES: TYPE OF FINISH IS NOT AVAILABLE
TECHNICAL CHARACTERISTICS
SPECIAL TEST FEATURESTYPE OF FINISH IS NOT AVAILABLE
SPECIAL FEATURESM16 METRIC 8.8 HEX NUTS, NUT, HEX, NA, UNITS PER PK = 25, BD ITEM CD557611.
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT,PLAIN,HEXAGON
END ITEM IDENTIFICATIONBUFFALO
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 CD557611?
CD557611 is a NUT,PLAIN,HEXAGON.
What is the NSN for CD557611?
CD557611 is cataloged in the U.S. Government catalog under NSN 5310-01-561-6509. 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.