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S31-04509 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S31-04509: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: RUBBER OVERALL, special_features: SIREN; 2MM MM, end_item_identification: HPSA-3100, MSA-3100 AND HPSA-7100 SERIES HIGH POWERED SPEAKER ARRAY HORN ASSEMBLY. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-603-7097, 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
S31-04509
NSN: 5310-01-603-7097
FSC: 5310 — Nuts and Washers
CAGE: 1J5K2 — COOPER NOTIFICATION, INC. (USA)
SPECIFICATIONS
materialRUBBER OVERALL
special_featuresSIREN; 2MM MM
end_item_identificationHPSA-3100, MSA-3100 AND HPSA-7100 SERIES HIGH POWERED SPEAKER ARRAY HORN ASSEMBLY
NSN5310-01-603-7097
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S31-04509 · 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: RUBBER OVERALL
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESSIREN; 2MM MM
END ITEM IDENTIFICATIONHPSA-3100, MSA-3100 AND HPSA-7100 SERIES HIGH POWERED SPEAKER ARRAY HORN ASSEMBLY
MATERIALRUBBER OVERALL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S31-04509?
S31-04509 is a WASHER,FLAT.
What is the NSN for S31-04509?
S31-04509 is cataloged in the U.S. Government catalog under NSN 5310-01-603-7097. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.