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CSA20042 ✓ 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 WASHER,LOCK is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-550-1130, 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
CSA20042
NSN: 5310-00-550-1130
FSC: 5310
CAGE: 82254 — CURTIS DYNA-FOG, LTD. (USA)
SPECIFICATIONS
Part NumberCSA20042
NSN5310-00-550-1130
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: CSA20042 · 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 26
2155Interchangeable
interchangeable cross-reference
interchangeable
1617823Interchangeable
interchangeable cross-reference
interchangeable
BUWEPSDWG1617823Interchangeable
interchangeable cross-reference
interchangeable
MS35333-113Interchangeable
interchangeable cross-reference
interchangeable
MILW6986TYPEAInterchangeable
interchangeable cross-reference
interchangeable
13230E6743Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CSA20042?
CSA20042 is a WASHER,LOCK.
What parts can replace CSA20042?
There are 26 known substitutes for CSA20042: 2155, 1617823, BUWEPSDWG1617823 and 23 more. Substitute compatibility should be verified for your specific system.
Is CSA20042 still available?
CSA20042 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