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R419P3 ✓ 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,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL UNS S34720 OR STEEL UNS S34723 OVERALL, nut_style: HEXAGON, nut_height: 0.350 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-055-2105, 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
R419P3
NSN: 5310-00-055-2105
FSC: 5310
CAGE: 52828 — REPUBLIC FASTENER MFG. CORP. DBA ARCONIC FASTENING SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL UNS S34720 OR STEEL UNS S34723 OVERALL
nut_styleHEXAGON
nut_height0.350 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
precious_materialSILVER
surface_treatmentSILVER OVERALL
width_across_flats0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
nominal_thread_size0.190 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-00-055-2105
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: R419P3 · 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
•
THREAD CLASS: 3B
•
NUT HEIGHT: 0.350 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 32
•
NOMINAL THREAD SIZE: 0.190 INCHES IN
•
THREAD SERIES: UNF
•
BEARING SURFACE TYPE: CHAMFERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5642 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
MATERIAL: STEEL UNS S34720 OR STEEL UNS S34723 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
NUT HEIGHT0.350 INCHES NOMINAL IN
THREAD QUANTITY PER INCH32
NOMINAL THREAD SIZE0.190 INCHES IN
THREAD SERIESUNF
BEARING SURFACE TYPECHAMFERED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5642 ASSN STD ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL UNS S34720 OR STEEL UNS S34723 OVERALL
NUT STYLEHEXAGON
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
62H348-1Interchangeable
interchangeable cross-reference
interchangeable
990FR12-1032Interchangeable
interchangeable cross-reference
interchangeable
752-4Interchangeable
interchangeable cross-reference
interchangeable
R419P3CInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R419P3?
R419P3 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace R419P3?
There are 4 known substitutes for R419P3: 62H348-1, 990FR12-1032, 752-4 and 1 more. Substitute compatibility should be verified for your specific system.
Is R419P3 still available?
R419P3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026