PartsTable
Technical Data Sheet

SY/97-25-107 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

SY/97-25-107: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 464 OVERALL, thickness: 0.125 INCHES NOMINAL IN, hole_diameter: 0.438 INCHES NOMINAL IN, overall_diameter: 2.875 INCHES NOMINAL IN, material_document_and_classification: QQ-B-639 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-363-0739, 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
SY/97-25-107
NSN: 5310-01-363-0739
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY 464 OVERALL
thickness0.125 INCHES NOMINAL IN
hole_diameter0.438 INCHES NOMINAL IN
overall_diameter2.875 INCHES NOMINAL IN
material_document_and_classificationQQ-B-639 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-363-0739
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SY/97-25-107 · 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
•
OVERALL DIAMETER: 2.875 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-639 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: COPPER ALLOY 464 OVERALL
•
HOLE DIAMETER: 0.438 INCHES NOMINAL IN
•
THICKNESS: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER2.875 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-639 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALCOPPER ALLOY 464 OVERALL
HOLE DIAMETER0.438 INCHES NOMINAL IN
THICKNESS0.125 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
206430 PC. NO.Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
206430 PC 10Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 SY/97-25-107?
SY/97-25-107 is a WASHER,FLAT.
What parts can replace SY/97-25-107?
There are 2 known substitutes for SY/97-25-107: 206430 PC. NO., 206430 PC 10. Substitute compatibility should be verified for your specific system.
What is the NSN for SY/97-25-107?
SY/97-25-107 is cataloged in the U.S. Government catalog under NSN 5310-01-363-0739. 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.