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Technical Data Sheet
PartsTable / COMPONENT / 504B8-31-89
504B8-31-89 ✓ 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: STEEL OVERALL, thickness: 0.031 INCHES NOMINAL IN, hole_diameter: 0.140 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN, overall_diameter: 0.250 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, surface_treatment: CADMIUM OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-264-1395, 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
504B8-31-89
NSN: 5310-00-264-1395
FSC: 5310
CAGE: 94033 — CARDWELL CONDENSER CORP LAPOINTE-ADMIRAL DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.031 INCHES NOMINAL IN
hole_diameter0.140 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
overall_diameter0.250 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-636-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-264-1395
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 504B8-31-89 · 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: 0.250 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-636-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
THICKNESS: 0.031 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.140 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.250 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-636-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.031 INCHES NOMINAL IN
HOLE DIAMETER0.140 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
W7955-1.250D-28Interchangeable
interchangeable cross-reference
interchangeable
5310PL1332399Interchangeable
interchangeable cross-reference
interchangeable
361984Interchangeable
interchangeable cross-reference
interchangeable
24735Interchangeable
interchangeable cross-reference
interchangeable
W6727Interchangeable
interchangeable cross-reference
interchangeable
41271Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 504B8-31-89?
504B8-31-89 is a WASHER,FLAT.
What parts can replace 504B8-31-89?
There are 12 known substitutes for 504B8-31-89: W7955-1.250D-28, 5310PL1332399, 361984 and 9 more. Substitute compatibility should be verified for your specific system.
Is 504B8-31-89 still available?
504B8-31-89 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