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Technical Data Sheet
A311813 ✓ 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: 0.108 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN, hole_diameter: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN, overall_diameter: 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN, surface_treatment: CADMIUM OR ZINC OVERALL, peripheral_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 5310-00-013-1017, 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
A311813
NSN: 5310-00-013-1017
FSC: 5310
CAGE: 00000
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.108 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN
hole_diameter0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
overall_diameter1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN
surface_treatmentCADMIUM OR ZINC OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
nondefinitive_spec/std_dataA TYPE
departure_from_cited_documentAS MODIFIED BY SURFACE TREATMENT RQMT
NSN5310-00-013-1017
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A311813 · 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
CENTER HOLE SHAPE STYLE: ROUND
THICKNESS: 0.108 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY SURFACE TREATMENT RQMT
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
NONDEFINITIVE SPEC/STD DATA: A TYPE
OVERALL DIAMETER: 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN
MATERIAL: STEEL OVERALL
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.108 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY SURFACE TREATMENT RQMT
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE
OVERALL DIAMETER1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
HOLE DIAMETER0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
276MR109AP7Interchangeable
interchangeable cross-reference
interchangeable
GS67A72-1Interchangeable
interchangeable cross-reference
interchangeable
276MR109P5Interchangeable
interchangeable cross-reference
interchangeable
131-017Interchangeable
interchangeable cross-reference
interchangeable
33803Interchangeable
interchangeable cross-reference
interchangeable
601514Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A311813?
A311813 is a WASHER,FLAT.
What parts can replace A311813?
There are 9 known substitutes for A311813: 276MR109AP7, GS67A72-1, 276MR109P5 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A311813?
A311813 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-013-1017. This indicates validated use in U.S. government and defense supply chains.
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