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PartsTable / COMPONENT / 3549211C1
3549211C1 ✓ 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,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include nut_style: HEXAGON, nut_height: 0.427 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND, width_across_flats: 0.752 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-556-6024, 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
3549211C1
NSN: 5310-01-556-6024
FSC: 5310
CAGE: 338X5 — ND DEFENSE LLC (USA)
SPECIFICATIONS
nut_styleHEXAGON
nut_height0.427 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats0.752 INCHES MAXIMUM IN
nominal_thread_size0.500 INCHES IN
end_item_identificationMRAP - UNIQUE NSN - MAXXPRO CAT I
thread_quantity_per_inch20
part_name_assigned_by_controlling_agencyNUT,HEX LK CTR BOLT 1/2NF
NSN5310-01-556-6024
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3549211C1 · 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
•
THREAD SERIES: UNF
•
NUT HEIGHT: 0.427 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 20
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNF
NUT HEIGHT0.427 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMRAP - UNIQUE NSN - MAXXPRO CAT I
THREAD CLASS2B
THREAD QUANTITY PER INCH20
NOMINAL THREAD SIZE0.500 INCHES IN
THREAD DIRECTIONRIGHT-HAND
NUT STYLEHEXAGON
WIDTH ACROSS FLATS0.752 INCHES MAXIMUM IN
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT,HEX LK CTR BOLT 1/2NF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
36859Interchangeable
interchangeable cross-reference
interchangeable
10-2455-9Interchangeable
interchangeable cross-reference
interchangeable
12759-00122Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3549211C1?
3549211C1 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 3549211C1?
There are 3 known substitutes for 3549211C1: 36859, 10-2455-9, 12759-00122. Substitute compatibility should be verified for your specific system.
What is the NSN for 3549211C1?
3549211C1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-556-6024. 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