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PartsTable / COMPONENT / 999-2003-0-03 ITEM 655
999-2003-0-03 ITEM 655 ✓ 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. Key specifications include material: STEEL OVERALL, hole_diameter: 0.502 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN, outside_diameter: 0.869 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, material_thickness: 0.125 INCHES NOMINAL 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 5310-01-424-6560, 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
999-2003-0-03 ITEM 655
NSN: 5310-01-424-6560
FSC: 5310
CAGE: 10941 — CARVER PUMP COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.502 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN
outside_diameter0.869 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
material_thickness0.125 INCHES NOMINAL IN
NSN5310-01-424-6560
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 999-2003-0-03 ITEM 655 · 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
•
HOLE DIAMETER: 0.502 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
OUTSIDE DIAMETER: 0.869 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.502 INCHES MINIMUM AND 0.512 INCHES MAXIMUM IN
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER0.869 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
5310PL1368737Interchangeable
interchangeable cross-reference
interchangeable
NAS1149F0663PInterchangeable
interchangeable cross-reference
interchangeable
5310PL1873845Interchangeable
interchangeable cross-reference
interchangeable
124-4322621 PC 109Interchangeable
interchangeable cross-reference
interchangeable
122-6818601 PCInterchangeable
interchangeable cross-reference
interchangeable
122-2557733 PC NO. 71Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 999-2003-0-03 ITEM 655?
999-2003-0-03 ITEM 655 is a WASHER,LOCK.
What parts can replace 999-2003-0-03 ITEM 655?
There are 13 known substitutes for 999-2003-0-03 ITEM 655: 5310PL1368737, NAS1149F0663P, 5310PL1873845 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 999-2003-0-03 ITEM 655?
999-2003-0-03 ITEM 655 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-424-6560. 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