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HR2566EPC89 ✓ 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: LEAD ALLOY B OVERALL, thickness: 0.062 INCHES NOMINAL IN, hole_diameter: 0.687 INCHES NOMINAL IN, overall_diameter: 1.125 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-188-3273, 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
HR2566EPC89
NSN: 5310-00-188-3273
FSC: 5310
CAGE: 93236 — DRESSER-RAND CO WORTHINGTON COMPRESSOR OPN A JOINT VENTURE (USA)
SPECIFICATIONS
materialLEAD ALLOY B OVERALL
thickness0.062 INCHES NOMINAL IN
hole_diameter0.687 INCHES NOMINAL IN
overall_diameter1.125 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-L-201 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-188-3273
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: HR2566EPC89 · 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: 1.125 INCHES NOMINAL IN
•
MATERIAL: LEAD ALLOY B OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-L-201 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.687 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
THICKNESS: 0.062 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER1.125 INCHES NOMINAL IN
MATERIALLEAD ALLOY B OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-L-201 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.687 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.062 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
1066INInterchangeable
interchangeable cross-reference
interchangeable
10661NInterchangeable
interchangeable cross-reference
interchangeable
ABT10661Interchangeable
interchangeable cross-reference
interchangeable
GKT643Interchangeable
Same NIIN cross-reference
interchangeable
HR4823PC62Interchangeable
Same NIIN cross-reference
interchangeable
HL4261PC176Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HR2566EPC89?
HR2566EPC89 is a WASHER,FLAT.
What parts can replace HR2566EPC89?
There are 12 known substitutes for HR2566EPC89: 1066IN, 10661N, ABT10661 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HR2566EPC89?
HR2566EPC89 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-188-3273. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026