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13KP256 ✓ 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. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-049-2001, 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
13KP256
NSN: 5310-01-049-2001
FSC: 5310
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
Part Number13KP256
NSN5310-01-049-2001
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 13KP256 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
559-552AInterchangeable
interchangeable cross-reference
interchangeable
223288Interchangeable
interchangeable cross-reference
interchangeable
19269HInterchangeable
interchangeable cross-reference
interchangeable
K8249Interchangeable
interchangeable cross-reference
interchangeable
8249Interchangeable
interchangeable cross-reference
interchangeable
22CR8Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 13KP256?
13KP256 is a NUT,PLAIN,HEXAGON.
What parts can replace 13KP256?
There are 16 known substitutes for 13KP256: 559-552A, 223288, 19269H and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 13KP256?
13KP256 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-049-2001. 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