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Technical Data Sheet
PartsTable / COMPONENT / APR3-6
APR3-6 ✓ 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,RECESSED is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 11 OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 0.200 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN, recess_diameter: 0.232 INCHES MINIMUM AND 0.237 INCHES MAXIMUM IN, outside_diameter: 0.547 INCHES MINIMUM AND 0.552 INCHES MAXIMUM IN, special_features: CHAMFERED ON OUTSIDE EDGE 3/64 BY 45 DEG. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-524-5634, 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
APR3-6
NSN: 5310-00-524-5634
FSC: 5310
CAGE: 18163 — EATON CORP CONTROLS DIV (USA)
SPECIFICATIONS
materialCOPPER ALLOY 11 OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter0.200 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
recess_diameter0.232 INCHES MINIMUM AND 0.237 INCHES MAXIMUM IN
outside_diameter0.547 INCHES MINIMUM AND 0.552 INCHES MAXIMUM IN
special_featuresCHAMFERED ON OUTSIDE EDGE 3/64 BY 45 DEG
style_designatorRECESSED
material_thickness0.078 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
material_document_and_classificationQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-524-5634
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: APR3-6 · 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
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL: COPPER ALLOY 11 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.078 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.200 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.232 INCHES MINIMUM AND 0.237 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.547 INCHES MINIMUM AND 0.552 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORRECESSED
MATERIALCOPPER ALLOY 11 OVERALL
SPECIAL FEATURESCHAMFERED ON OUTSIDE EDGE 3/64 BY 45 DEG
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.078 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
HOLE DIAMETER0.200 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
RECESS DIAMETER0.232 INCHES MINIMUM AND 0.237 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.547 INCHES MINIMUM AND 0.552 INCHES MAXIMUM IN
RECESS ANGLE90.0 DEGREES NOMINAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
914080Interchangeable
interchangeable cross-reference
interchangeable
912690Interchangeable
interchangeable cross-reference
interchangeable
912885Interchangeable
interchangeable cross-reference
interchangeable
B107.500Interchangeable
interchangeable cross-reference
interchangeable
PR36Interchangeable
interchangeable cross-reference
interchangeable
33S009018Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is APR3-6?
APR3-6 is a WASHER,RECESSED.
What parts can replace APR3-6?
There are 9 known substitutes for APR3-6: 914080, 912690, 912885 and 6 more. Substitute compatibility should be verified for your specific system.
Is APR3-6 still available?
APR3-6 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026