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EAA6552A ✓ 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 NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1212 OVERALL, nut_style: HEXAGON, nut_height: 0.250 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-417-0630, 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
EAA6552A
NSN: 5310-00-417-0630
FSC: 5310
CAGE: 57526 — FORD MOTOR COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 1212 OVERALL
nut_styleHEXAGON
nut_height0.250 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.625 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch20
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-417-0630
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: EAA6552A · 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
•
WIDTH ACROSS FLATS: 0.625 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
THREAD SERIES: UNF
•
THREAD QUANTITY PER INCH: 20
•
BEARING SURFACE TYPE: WASHER FACED
•
THREAD CLASS: 3B
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.625 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.438 INCHES IN
THREAD SERIESUNF
THREAD QUANTITY PER INCH20
BEARING SURFACE TYPEWASHER FACED
THREAD CLASS3B
SURFACE TREATMENTCADMIUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NUT STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
1G100Interchangeable
interchangeable cross-reference
interchangeable
1487Interchangeable
interchangeable cross-reference
interchangeable
PL1487Interchangeable
interchangeable cross-reference
interchangeable
MIL-C-52404Interchangeable
interchangeable cross-reference
interchangeable
19-004-1324Interchangeable
interchangeable cross-reference
interchangeable
N26229PC6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is EAA6552A?
EAA6552A is a NUT,PLAIN,HEXAGON.
What parts can replace EAA6552A?
There are 13 known substitutes for EAA6552A: 1G100, 1487, PL1487 and 10 more. Substitute compatibility should be verified for your specific system.
Is EAA6552A still available?
EAA6552A 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