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PartsTable / COMPONENT / 431804
431804 ✓ 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,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OR STEEL COMP 347 OVERALL, nut_style: HEXAGON, nut_height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-275-5512, 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
431804
NSN: 5310-00-275-5512
FSC: 5310
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OR STEEL COMP 347 OVERALL
nut_styleHEXAGON
nut_height0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeFLAT
thread_quantity_per_inch20
specification/standard_data96906-MS35691/CANCELED/ GOVERNMENT STANDARD
NSN5310-00-275-5512
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 431804 · 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: PASSIVATE OVERALL
•
NUT HEIGHT: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
BEARING SURFACE TYPE: FLAT
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 20
•
WIDTH ACROSS FLATS: 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTPASSIVATE OVERALL
NUT HEIGHT0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.250 INCHES IN
BEARING SURFACE TYPEFLAT
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH20
WIDTH ACROSS FLATS0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
SPECIFICATION/STANDARD DATA96906-MS35691/CANCELED/ GOVERNMENT STANDARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
A-A-52047Interchangeable
interchangeable cross-reference
interchangeable
AA52047DLP2BInterchangeable
interchangeable cross-reference
interchangeable
A52047-D-V-2Interchangeable
interchangeable cross-reference
interchangeable
N74S38JInterchangeable
interchangeable cross-reference
interchangeable
587-500Interchangeable
interchangeable cross-reference
interchangeable
SN54S38JInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 431804?
431804 is a NUT,PLAIN,HEXAGON.
What parts can replace 431804?
There are 10 known substitutes for 431804: A-A-52047, AA52047DLP2B, A52047-D-V-2 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 431804?
431804 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-275-5512. 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