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PartsTable / COMPONENT / RY-171221 ITEM 8
RY-171221 ITEM 8 ✓ 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,PUMP SHAFT 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 5310-01-125-9907, 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
RY-171221 ITEM 8
NSN: 5310-01-125-9907
FSC: 5310
CAGE: 93232 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DBA CURTISS WRIGHT ENGINEERED PUMP DIVISION USE CAGE CODE 0UBG9 FOR CATALOGING (USA)
SPECIFICATIONS
Part NumberRY-171221 ITEM 8
NSN5310-01-125-9907
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: RY-171221 ITEM 8 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: NICKLE COPPER ALLOY,QQ-N-281-D,CLASS A,COLD DRAWN,STRESS RELIEVED;WIDTH 1.562 IN.;OUTSIDE DIAMETER 1.625 IN.;FIRST END INSIDE DIAMETER 1.264 IN.;THREADED HOLE 2 PLACES 0.250-20UNC-2B;UNTHREADED HOLE 2 PLACES 0.281 IN. DIAMETER;FIRST END FIRST GROOVE DIAMETER 1.431 IN.,WIDTH 0.059 IN.;SECOND END COUNTERBORE DIAMTER 1.378 IN.,DEPTH 0.25 IN.;RIGHT HAND THREADS 1.375-12UNF-2B IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONNICKLE COPPER ALLOY,QQ-N-281-D,CLASS A,COLD DRAWN,STRESS RELIEVED;WIDTH 1.562 IN.;OUTSIDE DIAMETER 1.625 IN.;FIRST END INSIDE DIAMETER 1.264 IN.;THREADED HOLE 2 PLACES 0.250-20UNC-2B;UNTHREADED HOLE 2 PLACES 0.281 IN. DIAMETER;FIRST END FIRST GROOVE DIAMETER 1.431 IN.,WIDTH 0.059 IN.;SECOND END COUNTERBORE DIAMTER 1.378 IN.,DEPTH 0.25 IN.;RIGHT HAND THREADS 1.375-12UNF-2B IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
10863Interchangeable
interchangeable cross-reference
interchangeable
39857901PHInterchangeable
interchangeable cross-reference
interchangeable
RY-171221 ITEM 9Interchangeable
interchangeable cross-reference
interchangeable
398579-00Interchangeable
Same NIIN cross-reference
interchangeable
39857900PHInterchangeable
Same NIIN cross-reference
interchangeable
CS-4320-SV-0733Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RY-171221 ITEM 8?
RY-171221 ITEM 8 is a NUT,PUMP SHAFT.
What parts can replace RY-171221 ITEM 8?
There are 7 known substitutes for RY-171221 ITEM 8: 10863, 39857901PH, RY-171221 ITEM 9 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RY-171221 ITEM 8?
RY-171221 ITEM 8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-125-9907. 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