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Technical Data Sheet
404890 ✓ 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 OVERALL, nut_style: HEXAGON, nut_height: 0.375 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, 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 5310-00-275-2088, 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
404890
NSN: 5310-00-275-2088
FSC: 5310
CAGE: 77294 — PIPER INDUSTRIAL MANUFACTURING COMPANY, LLC DIV PIPER INDUSTRIAL MANUFACTURING COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.375 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats1.813 INCHES NOMINAL IN
nominal_thread_size1.250 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch12
NSN5310-00-275-2088
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 404890 · 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 SERIES: UNF
NOMINAL THREAD SIZE: 0.375 INCHES IN
THREAD QUANTITY PER INCH: 24
BEARING SURFACE TYPE: FLAT
TEMP RATING: 250.0 FAHRENHEIT NOMINAL DEGF
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
THREAD CLASS: 3B
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNF
NOMINAL THREAD SIZE0.375 INCHES IN
THREAD QUANTITY PER INCH24
BEARING SURFACE TYPEFLAT
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
THREAD CLASS3B
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
MATERIALSTEEL LOCKING INSERT
NUT STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
464Interchangeable
interchangeable cross-reference
interchangeable
404890Interchangeable
interchangeable cross-reference
interchangeable
133613HInterchangeable
interchangeable cross-reference
interchangeable
SNJ54197JInterchangeable
interchangeable cross-reference
interchangeable
SN54197JInterchangeable
interchangeable cross-reference
interchangeable
SN44249JInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 404890?
404890 is a NUT,PLAIN,HEXAGON.
What parts can replace 404890?
There are 11 known substitutes for 404890: 464, 404890, 133613H and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 404890?
404890 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-275-2088. This indicates validated use in U.S. government and defense supply chains.
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