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PartsTable / COMPONENT / 410909-25
410909-25 ✓ 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 COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL, thickness: 0.027 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN, hole_diameter: 0.255 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN, overall_diameter: 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-515-7449, 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
410909-25
NSN: 5310-00-515-7449
FSC: 5310
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OVERALL
thickness0.027 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
hole_diameter0.255 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN
overall_diameter0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-763 FED SPEC ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationMIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-515-7449
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 410909-25 · 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
•
NONDEFINITIVE SPEC/STD DATA: A TYPE AND 2 GRADE AND B CLASS
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059 MIL SPEC 1ST MATERIAL RESPONSE AND MIL-S-6721 MIL SPEC 2ND MATERIAL RESPONSE AND MIL-S-6721 MIL SPEC 3RD MATERIAL RESPONSE AND MIL-S-6721 MIL SPEC 4TH MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL CORROSION RESISTING OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OVERALL
•
OVERALL DIAMETER: 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATAA TYPE AND 2 GRADE AND B CLASS
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059 MIL SPEC 1ST MATERIAL RESPONSE AND MIL-S-6721 MIL SPEC 2ND MATERIAL RESPONSE AND MIL-S-6721 MIL SPEC 3RD MATERIAL RESPONSE AND MIL-S-6721 MIL SPEC 4TH MATERIAL RESPONSE OVERALL
MATERIALSTEEL CORROSION RESISTING OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OVERALL
OVERALL DIAMETER0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
SURFACE TREATMENTPASSIVATE OVERALL
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.022 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
HOLE DIAMETER0.255 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
186511Interchangeable
interchangeable cross-reference
interchangeable
7315BGYInterchangeable
interchangeable cross-reference
interchangeable
SL8517-22Interchangeable
interchangeable cross-reference
interchangeable
7315BEGAYInterchangeable
interchangeable cross-reference
interchangeable
SSR3XR5Interchangeable
interchangeable cross-reference
interchangeable
SR3K4S6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 410909-25?
410909-25 is a WASHER,FLAT.
What parts can replace 410909-25?
There are 28 known substitutes for 410909-25: 186511, 7315BGY, SL8517-22 and 25 more. Substitute compatibility should be verified for your specific system.
Is 410909-25 still available?
410909-25 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026