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S-0420-3 — NUT,SELF-LOCKING,CLINCH

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S-0420-3: NUT,SELF-LOCKING,CLINCH.

The NUT,SELF-LOCKING,CLINCH is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: CLINCH, nut_height: 0.170 INCHES NOMINAL IN, nut_diameter: 0.440 INCHES NOMINAL IN, pilot_length: 0.120 INCHES NOMINAL IN, thread_series: UNF. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-865-5791, 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
S-0420-3
NSN: 5310-00-865-5791
NIINs: 008655791, 010045139
FSC: 5310 — Nuts and Washers
CAGE: 46384 — PENN ENGINEERING & MANUFACTURING CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleCLINCH
nut_height0.170 INCHES NOMINAL IN
nut_diameter0.440 INCHES NOMINAL IN
pilot_length0.120 INCHES NOMINAL IN
thread_seriesUNF
pilot_diameter0.343 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_size0.250 INCHES IN
drilled_hole_diameter0.344 INCHES NOMINAL IN
end_item_identificationMEDIUM MINE PROTECTED VEHICLE - MMPV
NSN5310-00-865-5791
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S-0420-3 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A165 ASSN STD ALL TREATMENT RESPONSES OVERALL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT DIAMETER: 0.438 INCHES NOMINAL IN
•
PILOT DIAMETER: 0.342 INCHES NOMINAL IN
•
PILOT LENGTH: 0.120 INCHES NOMINAL IN
•
NUT HEIGHT: 0.292 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM A165 ASSN STD ALL TREATMENT RESPONSES OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT DIAMETER0.438 INCHES NOMINAL IN
PILOT DIAMETER0.342 INCHES NOMINAL IN
PILOT LENGTH0.120 INCHES NOMINAL IN
NUT HEIGHT0.292 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
NUT STYLECLINCH
SUBSTITUTES & CROSS-REFERENCES 3
9721990Reference document
Same NSN cross-reference
Reference document — Secondary reference
414456-2504Reference document
Same NSN cross-reference
Reference document — Secondary reference
4189358Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S-0420-3?
S-0420-3 is a NUT,SELF-LOCKING,CLINCH.
What parts can replace S-0420-3?
There are 3 known substitutes for S-0420-3: 9721990, 414456-2504, 4189358. Substitute compatibility should be verified for your specific system.
What is the NSN for S-0420-3?
S-0420-3 is cataloged in the U.S. Government catalog under NSN 5310-00-865-5791. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
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.