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PartsTable / COMPONENT / 999F0576 PIECE 45
999F0576 PIECE 45 ✓ 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 999F0576 PIECE 45 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 5315-01-111-0370, 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
999F0576 PIECE 45
NSN: 5315-01-111-0370
FSC: 5315
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
Part Number999F0576 PIECE 45
NSN5315-01-111-0370
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 999F0576 PIECE 45 · 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 6
608500Interchangeable
interchangeable cross-reference
interchangeable
21421Interchangeable
interchangeable cross-reference
interchangeable
54245-19Interchangeable
interchangeable cross-reference
interchangeable
65574Interchangeable
interchangeable cross-reference
interchangeable
U134Interchangeable
interchangeable cross-reference
interchangeable
510134Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 999F0576 PIECE 45?
999F0576 PIECE 45 is a 999F0576 PIECE 45.
What parts can replace 999F0576 PIECE 45?
There are 6 known substitutes for 999F0576 PIECE 45: 608500, 21421, 54245-19 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 999F0576 PIECE 45?
999F0576 PIECE 45 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-111-0370. 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