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Technical Data Sheet
4243089 ✓ 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,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 4.3 MILLIMETERS MINIMUM AND 4.6 MILLIMETERS MAXIMUM MM, overall_height: 1.0 MILLIMETERS MINIMUM AND 2.0 MILLIMETERS MAXIMUM MM, outside_diameter: 8.63 MILLIMETERS MINIMUM AND 9.38 MILLIMETERS MAXIMUM MM, special_features: FINISH PER ISO 4042, style_designator: SPRING TENSION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-663-0671, 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
4243089
NSN: 5310-01-663-0671
FSC: 5310
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter4.3 MILLIMETERS MINIMUM AND 4.6 MILLIMETERS MAXIMUM MM
overall_height1.0 MILLIMETERS MINIMUM AND 2.0 MILLIMETERS MAXIMUM MM
outside_diameter8.63 MILLIMETERS MINIMUM AND 9.38 MILLIMETERS MAXIMUM MM
special_featuresFINISH PER ISO 4042
style_designatorSPRING TENSION
surface_treatmentZINC OVERALL
material_thickness0.45 MILLIMETERS MINIMUM AND 0.55 MILLIMETERS MAXIMUM MM
end_item_identification4210-01-622-0440; MRAP - M-ATV
part_name_assigned_by_controlling_agencyWASH, WAVE M4X9X.5 ZP
NSN5310-01-663-0671
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4243089 · 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
OUTSIDE DIAMETER: 8.63 MILLIMETERS MINIMUM AND 9.38 MILLIMETERS MAXIMUM MM
HOLE DIAMETER: 4.3 MILLIMETERS MINIMUM AND 4.6 MILLIMETERS MAXIMUM MM
MATERIAL THICKNESS: 0.45 MILLIMETERS MINIMUM AND 0.55 MILLIMETERS MAXIMUM MM
SURFACE TREATMENT: ZINC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER8.63 MILLIMETERS MINIMUM AND 9.38 MILLIMETERS MAXIMUM MM
END ITEM IDENTIFICATION4210-01-622-0440; MRAP - M-ATV
SPECIAL FEATURESFINISH PER ISO 4042
OVERALL HEIGHT1.0 MILLIMETERS MINIMUM AND 2.0 MILLIMETERS MAXIMUM MM
PART NAME ASSIGNED BY CONTROLLING AGENCYWASH, WAVE M4X9X.5 ZP
HOLE DIAMETER4.3 MILLIMETERS MINIMUM AND 4.6 MILLIMETERS MAXIMUM MM
MATERIAL THICKNESS0.45 MILLIMETERS MINIMUM AND 0.55 MILLIMETERS MAXIMUM MM
SURFACE TREATMENTZINC OVERALL
STYLE DESIGNATORSPRING TENSION
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
40290Interchangeable
interchangeable cross-reference
interchangeable
B238Interchangeable
interchangeable cross-reference
interchangeable
M31Interchangeable
interchangeable cross-reference
interchangeable
7036150Interchangeable
interchangeable cross-reference
interchangeable
40976Interchangeable
interchangeable cross-reference
interchangeable
FS50102-2010Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4243089?
4243089 is a WASHER,SPRING TENSION.
What parts can replace 4243089?
There are 12 known substitutes for 4243089: 40290, B238, M31 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4243089?
4243089 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-663-0671. This indicates validated use in U.S. government and defense supply chains.
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