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PartsTable / COMPONENT / J437PC21
J437PC21 ✓ 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 J437PC21 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 5315-01-059-1847, 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
J437PC21
NSN: 5315-01-059-1847
FSC: 5315
CAGE: 53059 — SPIRAX SARCO INC DBA SPIRAX SARCO (USA)
SPECIFICATIONS
Part NumberJ437PC21
NSN5315-01-059-1847
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: J437PC21 · 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 9
62271-2PC81Interchangeable
interchangeable cross-reference
interchangeable
E38933-4PC81Interchangeable
interchangeable cross-reference
interchangeable
564-2200-936202PC81Interchangeable
interchangeable cross-reference
interchangeable
20896Interchangeable
interchangeable cross-reference
interchangeable
9772-12LESS9795-12Interchangeable
interchangeable cross-reference
interchangeable
9772-12LESSPT97921-03-00939Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is J437PC21?
J437PC21 is a J437PC21.
What parts can replace J437PC21?
There are 9 known substitutes for J437PC21: 62271-2PC81, E38933-4PC81, 564-2200-936202PC81 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for J437PC21?
J437PC21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-059-1847. 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