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12446435 ✓ 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.11 INCHES MINIMUM AND 0.13 INCHES MAXIMUM IN, hole_diameter: 0.331 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN, hardness_rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM, overall_diameter: 0.738 INCHES MINIMUM AND 0.768 INCHES MAXIMUM IN, surface_treatment: PHOSPHATE AND ZINC OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-645-9840, 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
12446435
NSN: 5310-01-645-9840
FSC: 5310
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.11 INCHES MINIMUM AND 0.13 INCHES MAXIMUM IN
hole_diameter0.331 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
overall_diameter0.738 INCHES MINIMUM AND 0.768 INCHES MAXIMUM IN
surface_treatmentPHOSPHATE AND ZINC OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identification2520-01-626-5061
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM F436 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyWASHER, HARDENED; COVER PLATE
NSN5310-01-645-9840
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12446435 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM F436 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
HOLE DIAMETER: 0.331 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN
•
THICKNESS: 0.11 INCHES MINIMUM AND 0.13 INCHES MAXIMUM IN
•
OVERALL DIAMETER: 0.738 INCHES MINIMUM AND 0.768 INCHES MAXIMUM IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONASTM F436 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HOLE DIAMETER0.331 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN
END ITEM IDENTIFICATION2520-01-626-5061
THICKNESS0.11 INCHES MINIMUM AND 0.13 INCHES MAXIMUM IN
OVERALL DIAMETER0.738 INCHES MINIMUM AND 0.768 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER, HARDENED; COVER PLATE
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
900-004Interchangeable
interchangeable cross-reference
interchangeable
402-0377-00Interchangeable
interchangeable cross-reference
interchangeable
402-0377-000Interchangeable
interchangeable cross-reference
interchangeable
41-054806-01Interchangeable
interchangeable cross-reference
interchangeable
BPF-L-161-100-00140Interchangeable
interchangeable cross-reference
interchangeable
D422/10X1X2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12446435?
12446435 is a WASHER,FLAT.
What parts can replace 12446435?
There are 13 known substitutes for 12446435: 900-004, 402-0377-00, 402-0377-000 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12446435?
12446435 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-645-9840. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026