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R419P4 — NUT,SELF-LOCKING,SLOTTED,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

R419P4: NUT,SELF-LOCKING,SLOTTED,HEXAGON.

NUT,SELF-LOCKING,SLOTTED,HEXAGON. Key specifications include material: STEEL COMP 347 OR STEEL UNS S34720 OR STEEL UNS S34723 OVERALL, nut_style: SLOTTED, HEXAGON, nut_height: 0.396 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN, temp_rating: 1200.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-198-4735, 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
R419P4
NSN: 5310-00-198-4735
FSC: 5310 — Nuts and Washers
CAGE: 52828 — REPUBLIC FASTENER MFG. CORP. DBA ARCONIC FASTENING SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 347 OR STEEL UNS S34720 OR STEEL UNS S34723 OVERALL
nut_styleSLOTTED, HEXAGON
nut_height0.396 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN
temp_rating1200.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
precious_materialSILVER
surface_treatmentSILVER OVERALL
width_across_flats0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
NSN5310-00-198-4735
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: R419P4 · 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
•
WIDTH ACROSS FLATS: 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
PRECIOUS MATERIAL: SILVER
•
TEMP RATING: 1200.0 FAHRENHEIT NOMINAL DEGF
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD 1ST MATERIAL RESPONSE OR AMS 5642 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5642 ASSN STD 3RD MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
THREAD SERIESUNF
PRECIOUS MATERIALSILVER
TEMP RATING1200.0 FAHRENHEIT NOMINAL DEGF
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD 1ST MATERIAL RESPONSE OR AMS 5642 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5642 ASSN STD 3RD MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT0.396 INCHES MINIMUM AND 0.411 INCHES MAXIMUM IN
SURFACE TREATMENTSILVER OVERALL
SUBSTITUTES & CROSS-REFERENCES 7
JL4907-428Reference document
Same NSN cross-reference
Reference document — Secondary reference
R419P4AReference document
Same NSN cross-reference
Reference document — Secondary reference
R419P4CReference document
Same NSN cross-reference
Reference document — Secondary reference
990FR12-428Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
R419P4DReference document
Same NSN cross-reference
Reference document — Secondary reference
Z1200-048Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is R419P4?
R419P4 is a NUT,SELF-LOCKING,SLOTTED,HEXAGON.
What parts can replace R419P4?
There are 7 known substitutes for R419P4: JL4907-428, R419P4A, R419P4C and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R419P4?
R419P4 is cataloged in the U.S. Government catalog under NSN 5310-00-198-4735. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.