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87398 ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include shape: IRREGULAR, material: STEEL BODY, thickness: 0.050 INCHES NOMINAL IN, hole_diameter: 0.116 INCHES NOMINAL IN, overall_length: 4.250 INCHES NOMINAL IN, mounting_method: SCREW. 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
87398
NSN: 5310-00-527-5840
FSC: 5310
CAGE: 70408 — AT AND T CORP (USA)
SPECIFICATIONS
shapeIRREGULAR
materialSTEEL BODY
thickness0.050 INCHES NOMINAL IN
hole_diameter0.116 INCHES NOMINAL IN
overall_length4.250 INCHES NOMINAL IN
mounting_methodSCREW
overall_diameter6.810 INCHES NOMINAL IN
features_providedCASEHARDENED
light_beam_motionFIXED
surface_treatmentENAMEL BODY
peripheral_shape_styleROUND
center_hole_shape_styleROUND
NSN5310-00-527-5840
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 87398 · 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 6
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
5012588-00Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 87398?
87398 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 87398?
There are 6 known substitutes for 87398: 87398, 7730288P1, 187988 and 3 more. Substitute compatibility should be verified for your specific system.
Is 87398 still available?
87398 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