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A47890 — NUT,PLAIN,EXTENDED WASHER,HEXAGO

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A47890: NUT,PLAIN,EXTENDED WASHER,HEXAGO.

NUT,PLAIN,EXTENDED WASHER,HEXAGO. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), overall_height: 0.400 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-118-2476, 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
A47890
NSN: 5310-01-118-2476
FSC: 5310 — Nuts and Washers
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height0.400 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
washer_thickness0.110 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
surface_treatmentZINC OVERALL
width_across_flats0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
nominal_thread_size0.500 INCHES IN
end_item_identificationMRAP BUFFALO MK2A2
washer_outside_diameter0.840 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN
NSN5310-01-118-2476
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A47890 · 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
•
WASHER OUTSIDE DIAMETER: 0.840 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: GM 4342-M,CODE 20D72,FSCM 16764 MFR REF SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
WASHER THICKNESS: 0.110 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: GM 286-M,FSCM 16764 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.400 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER0.840 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONGM 4342-M,CODE 20D72,FSCM 16764 MFR REF SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
WASHER THICKNESS0.110 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONGM 286-M,FSCM 16764 MFR REF SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.500 INCHES IN
SURFACE TREATMENTZINC OVERALL
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 3
2AG174Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
1979451Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
5310011182476Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A47890?
A47890 is a NUT,PLAIN,EXTENDED WASHER,HEXAGO.
What parts can replace A47890?
There are 3 known substitutes for A47890: 2AG174, 1979451, 5310011182476. Substitute compatibility should be verified for your specific system.
What is the NSN for A47890?
A47890 is cataloged in the U.S. Government catalog under NSN 5310-01-118-2476. 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.