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Technical Data Sheet
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87806 ✓ 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 special_features: SELECTED,TESTED AND CERTIFIED FOR TRIDENT SUBMARINE APPLICATION. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-187-1851, 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
87806
NSN: 5310-00-187-1851
FSC: 5310
CAGE: F0590 — THOMSON/HOUSTON HOTCHKISS/BRANDT (FRA)
SPECIFICATIONS
special_featuresSELECTED,TESTED AND CERTIFIED FOR TRIDENT SUBMARINE APPLICATION
NSN5310-00-187-1851
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 87806 · 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: 0.562 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 1010 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HARDNESS RATING: 38.0 ROCKWELL B MINIMUM AND 52.0 ROCKWELL B MAXIMUM
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.562 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 1010 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
CENTER HOLE SHAPE STYLEROUND
HARDNESS RATING38.0 ROCKWELL B MINIMUM AND 52.0 ROCKWELL B MAXIMUM
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.032 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN
HOLE DIAMETER0.328 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
2708-1-2-5AInterchangeable
interchangeable cross-reference
interchangeable
SN1105Interchangeable
interchangeable cross-reference
interchangeable
F5956Interchangeable
interchangeable cross-reference
interchangeable
42952Interchangeable
interchangeable cross-reference
interchangeable
39641Interchangeable
interchangeable cross-reference
interchangeable
SMD422740Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 87806?
87806 is a WASHER,FLAT.
What parts can replace 87806?
There are 23 known substitutes for 87806: 2708-1-2-5A, SN1105, F5956 and 20 more. Substitute compatibility should be verified for your specific system.
Is 87806 still available?
87806 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