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4M398-8 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4M398-8: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include width: 1.514 INCHES NOMINAL IN, length: 2.011 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, thickness: 0.030 INCHES NOMINAL IN, hole_diameter: 1.259 INCHES NOMINAL IN, special_features: SMALLER END OF WASHER IS TABBED 40-50 DEGREES BEGINNING AT 0.880 INCHES FROM WASHER CENTER HOLE IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-502-4840, 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
4M398-8
NSN: 5310-01-502-4840
FSC: 5310 — Nuts and Washers
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
width1.514 INCHES NOMINAL IN
length2.011 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
thickness0.030 INCHES NOMINAL IN
hole_diameter1.259 INCHES NOMINAL IN
special_featuresSMALLER END OF WASHER IS TABBED 40-50 DEGREES BEGINNING AT 0.880 INCHES FROM WASHER CENTER HOLE IN
center_hole_width1.387 INCHES NOMINAL IN
radius_at_large_end0.757 INCHES NOMINAL IN
radius_at_small_end1.254 INCHES NOMINAL IN
peripheral_shape_styleOVAL
center_hole_shape_styleDEE
end_item_identificationF/A-18E AIRCRAFT
NSN5310-01-502-4840
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4M398-8 · 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
•
CENTER HOLE WIDTH: 1.387 INCHES NOMINAL IN
•
LENGTH: 2.011 INCHES NOMINAL IN
•
RADIUS AT LARGE END: 0.757 INCHES NOMINAL IN
•
CRITICALITY CODE JUSTIFICATION: AGAV
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: OVAL
•
WIDTH: 1.514 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CENTER HOLE WIDTH1.387 INCHES NOMINAL IN
LENGTH2.011 INCHES NOMINAL IN
RADIUS AT LARGE END0.757 INCHES NOMINAL IN
CRITICALITY CODE JUSTIFICATIONAGAV
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SPECIAL FEATURESSMALLER END OF WASHER IS TABBED 40-50 DEGREES BEGINNING AT 0.880 INCHES FROM WASHER CENTER HOLE IN
PERIPHERAL SHAPE STYLEOVAL
WIDTH1.514 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCY(INAVY) WASHER, TAB--SAFETY WIRE
END ITEM IDENTIFICATIONF/A-18E AIRCRAFT
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4M398-8?
4M398-8 is a WASHER,FLAT.
What is the NSN for 4M398-8?
4M398-8 is cataloged in the U.S. Government catalog under NSN 5310-01-502-4840. This indicates validated use in U.S. government and defense supply chains.
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