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22478 ✓ 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 RETAINER,SEAT,VALVE is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: ALUM;2.328 IN. WD BY 2.563 LG BY 3.437 IN.

HGT O/A 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 5310-00-072-0393, 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
22478
NSN: 5310-00-072-0393
FSC: 5310
CAGE: 80221 — DRESSER INDUSTRIES INC (USA)
SPECIFICATIONS
general_characteristics_item_descriptionALUM;2.328 IN. WD BY 2.563 LG BY 3.437 IN. HGT O/A IN
NSN5310-00-072-0393
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 22478 · 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
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
OVERALL DIAMETER: 1.062 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.312 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.188 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL CORROSION RESISTING OVERALL
OVERALL DIAMETER1.062 INCHES NOMINAL IN
HOLE DIAMETER0.312 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.188 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
N684PC11Interchangeable
interchangeable cross-reference
interchangeable
8170437Interchangeable
interchangeable cross-reference
interchangeable
22478Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 22478?
22478 is a RETAINER,SEAT,VALVE.
What parts can replace 22478?
There are 3 known substitutes for 22478: N684PC11, 8170437, 22478. Substitute compatibility should be verified for your specific system.
What is the NSN for 22478?
22478 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-072-0393. 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