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PartsTable / COMPONENT / 5012588-00
5012588-00 ✓ 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: 0.050 INCHES NOMINAL IN, hole_diameter: 0.116 INCHES NOMINAL IN, overall_diameter: 0.250 INCHES NOMINAL IN, features_provided: CASEHARDENED, surface_treatment: NICKEL OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-527-5840, 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
5012588-00
NSN: 5310-00-527-5840
FSC: 5310
CAGE: 90536 — LOCKHEED MARTIN CORP DBA LOCKHEED MARTIN DIV MST - EAGAN (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.050 INCHES NOMINAL IN
hole_diameter0.116 INCHES NOMINAL IN
overall_diameter0.250 INCHES NOMINAL IN
features_providedCASEHARDENED
surface_treatmentNICKEL OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-527-5840
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5012588-00 · 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: NICKEL OVERALL
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.116 INCHES NOMINAL IN
•
FEATURES PROVIDED: CASEHARDENED
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
THICKNESS: 0.050 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTNICKEL OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.116 INCHES NOMINAL IN
FEATURES PROVIDEDCASEHARDENED
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.050 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER0.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
87398Interchangeable
interchangeable cross-reference
interchangeable
7730288P1Interchangeable
interchangeable cross-reference
interchangeable
187988Interchangeable
interchangeable cross-reference
interchangeable
898826Interchangeable
interchangeable cross-reference
interchangeable
M2875Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5012588-00?
5012588-00 is a WASHER,FLAT.
What parts can replace 5012588-00?
There are 5 known substitutes for 5012588-00: 87398, 7730288P1, 187988 and 2 more. Substitute compatibility should be verified for your specific system.
Is 5012588-00 still available?
5012588-00 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