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HRDEK1 ✓ 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. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-540-1146, 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
HRDEK1
NSN: 5310-01-540-1146
FSC: 5310
CAGE: 0SMN2 — ITW GSE INC. (USA)
SPECIFICATIONS
Part NumberHRDEK1
NSN5310-01-540-1146
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: HRDEK1 · 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 8
75NM62Interchangeable
interchangeable cross-reference
interchangeable
298538P2Interchangeable
interchangeable cross-reference
interchangeable
9621-21Interchangeable
interchangeable cross-reference
interchangeable
79NM-62Interchangeable
interchangeable cross-reference
interchangeable
1287424-5Interchangeable
interchangeable cross-reference
interchangeable
10511921Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HRDEK1?
HRDEK1 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace HRDEK1?
There are 8 known substitutes for HRDEK1: 75NM62, 298538P2, 9621-21 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HRDEK1?
HRDEK1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-540-1146. 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