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Technical Data Sheet
PartsTable / COMPONENT / 688002-027
688002-027 ✓ 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: PLASTIC OVERALL, thickness: 0.031 INCHES NOMINAL IN, hole_diameter: 0.115 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN, overall_diameter: 0.307 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-531-2886, 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
688002-027
NSN: 5310-00-531-2886
FSC: 5310
CAGE: 50027 — UNDERSEA SENSOR SYSTEMS INC DIV ULTRA SONOBUOY SYSTEMS (USA)
SPECIFICATIONS
materialPLASTIC OVERALL
thickness0.031 INCHES NOMINAL IN
hole_diameter0.115 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN
overall_diameter0.307 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-531-2886
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 688002-027 · 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
•
THICKNESS: 0.031 INCHES NOMINAL IN
•
MATERIAL: PLASTIC OVERALL
•
HOLE DIAMETER: 0.115 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN
•
OVERALL DIAMETER: 0.307 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.031 INCHES NOMINAL IN
MATERIALPLASTIC OVERALL
HOLE DIAMETER0.115 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN
OVERALL DIAMETER0.307 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
3MJN0Interchangeable
interchangeable cross-reference
interchangeable
3816808Interchangeable
interchangeable cross-reference
interchangeable
12500836Interchangeable
interchangeable cross-reference
interchangeable
G3M27C58-313Interchangeable
Same NIIN cross-reference
interchangeable
H400-313Interchangeable
Same NIIN cross-reference
interchangeable
3050-1207Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 688002-027?
688002-027 is a WASHER,FLAT.
What parts can replace 688002-027?
There are 7 known substitutes for 688002-027: 3MJN0, 3816808, 12500836 and 4 more. Substitute compatibility should be verified for your specific system.
Is 688002-027 still available?
688002-027 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