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FC809 ✓ 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 hole_diameter: 0.266 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN, overall_height: 0.110 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN, outside_diameter: 0.673 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN, special_features: WITH 0.062 IN. SLOT IN, style_designator: SPRING TENSION, surface_treatment: ZINC OVERALL.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-740-9385, 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
FC809
NSN: 5310-00-740-9385
FSC: 5310
CAGE: 63477 — FEDERAL MOGUL CORP SUB WAGNER BRAKE MOOG AUTOMOTIVE DIV (USA)
SPECIFICATIONS
hole_diameter0.266 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
overall_height0.110 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
outside_diameter0.673 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN
special_featuresWITH 0.062 IN. SLOT IN
style_designatorSPRING TENSION
surface_treatmentZINC OVERALL
material_thickness0.016 INCHES NOMINAL IN
surface_treatment_document_and_classificationQQ-Z-325 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-740-9385
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: FC809 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-Z-325 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD 1ST MATERIAL RESPONSE OR QQ-B-750 FED SPEC 2ND MATERIAL RESPONSE OR SAE ASSN STD 3RD MATERIAL RESPONSE OR ASTM A682 ASSN STD 3RD MATERIAL RESPONSE OR SAE ASSN STD 4TH MATERIAL RESPONSE OR ASTM A682 ASSN STD 4TH MATERIAL RESPONSE OR SAE ASSN STD 5TH MATERIAL RESPONSE OR ASTM A682 ASSN STD 5TH MATERIAL RESPONSE OR SAE ASSN STD 6TH MATERIAL RESPONSE OR ASTM A682 ASSN STD 6TH MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.673 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.016 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC OVERALL
•
HOLE DIAMETER: 0.266 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-Z-325 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD 1ST MATERIAL RESPONSE OR QQ-B-750 FED SPEC 2ND MATERIAL RESPONSE OR SAE ASSN STD 3RD MATERIAL RESPONSE OR ASTM A682 ASSN STD 3RD MATERIAL RESPONSE OR SAE ASSN STD 4TH MATERIAL RESPONSE OR ASTM A682 ASSN STD 4TH MATERIAL RESPONSE OR SAE ASSN STD 5TH MATERIAL RESPONSE OR ASTM A682 ASSN STD 5TH MATERIAL RESPONSE OR SAE ASSN STD 6TH MATERIAL RESPONSE OR ASTM A682 ASSN STD 6TH MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.673 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN
OVERALL HEIGHT0.110 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
SPECIAL FEATURESWITH 0.062 IN. SLOT IN
MATERIAL THICKNESS0.016 INCHES NOMINAL IN
SURFACE TREATMENTZINC OVERALL
HOLE DIAMETER0.266 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
STYLE DESIGNATORSPRING TENSION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
23-658Interchangeable
interchangeable cross-reference
interchangeable
876297Interchangeable
interchangeable cross-reference
interchangeable
023-0658-001Interchangeable
interchangeable cross-reference
interchangeable
RL/3391/868Interchangeable
interchangeable cross-reference
interchangeable
3150Interchangeable
interchangeable cross-reference
interchangeable
576555-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FC809?
FC809 is a WASHER,SPRING TENSION.
What parts can replace FC809?
There are 14 known substitutes for FC809: 23-658, 876297, 023-0658-001 and 11 more. Substitute compatibility should be verified for your specific system.
Is FC809 still available?
FC809 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