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Technical Data Sheet
PartsTable / COMPONENT / 5610-77-31
5610-77-31 ✓ 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 POLYAMIDE NYLON OVERALL, thickness: 0.031 INCHES NOMINAL IN, hole_diameter: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN, overall_diameter: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-245-3222, 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
5610-77-31
NSN: 5310-01-245-3222
FSC: 5310
CAGE: 86928 — SEASTROM MANUFACTURING CO INC (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON OVERALL
thickness0.031 INCHES NOMINAL IN
hole_diameter0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
overall_diameter0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-01-245-3222
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5610-77-31 · 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
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
THICKNESS: 0.031 INCHES NOMINAL IN
•
MATERIAL: PLASTIC POLYAMIDE NYLON OVERALL
•
HOLE DIAMETER: 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
•
OVERALL DIAMETER: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.031 INCHES NOMINAL IN
MATERIALPLASTIC POLYAMIDE NYLON OVERALL
HOLE DIAMETER0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN
OVERALL DIAMETER0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
M83248-1-906ESInterchangeable
interchangeable cross-reference
interchangeable
MILR83248-906ESInterchangeable
interchangeable cross-reference
interchangeable
SAE-AMS7276Interchangeable
interchangeable cross-reference
interchangeable
30117Interchangeable
interchangeable cross-reference
interchangeable
4WA13Interchangeable
interchangeable cross-reference
interchangeable
854Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5610-77-31?
5610-77-31 is a WASHER,FLAT.
What parts can replace 5610-77-31?
There are 14 known substitutes for 5610-77-31: M83248-1-906ES, MILR83248-906ES, SAE-AMS7276 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5610-77-31?
5610-77-31 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-245-3222. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026