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PartsTable / COMPONENT / 91455A999
91455A999 ✓ 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 color: YELLOW OVERALL, material: STEEL OVERALL, thickness: 2.3 MILLIMETERS MINIMUM AND 2.7 MILLIMETERS MAXIMUM MM, hole_diameter: 13.0 MILLIMETERS MINIMUM AND 13.2 MILLIMETERS MAXIMUM MM, overall_diameter: 23.4 MILLIMETERS MINIMUM AND 24.0 MILLIMETERS MAXIMUM MM, special_features: MATERIAL LOW CARBON STEEL;OD MIN 23.48MM, MAX 24.00MM;ID MIN 13.00MM, MAX 13.27MM;THICKNESS MIN 2.30, MAX 2.70 MM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-572-4252, 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
91455A999
NSN: 5310-01-572-4252
FSC: 5310
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
colorYELLOW OVERALL
materialSTEEL OVERALL
thickness2.3 MILLIMETERS MINIMUM AND 2.7 MILLIMETERS MAXIMUM MM
hole_diameter13.0 MILLIMETERS MINIMUM AND 13.2 MILLIMETERS MAXIMUM MM
overall_diameter23.4 MILLIMETERS MINIMUM AND 24.0 MILLIMETERS MAXIMUM MM
special_featuresMATERIAL LOW CARBON STEEL;OD MIN 23.48MM, MAX 24.00MM;ID MIN 13.00MM, MAX 13.27MM;THICKNESS MIN 2.30, MAX 2.70 MM
surface_treatmentZINC OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
part_name_assigned_by_controlling_agencyGM12 FLAT WASHER
surface_treatment_document_and_classificationASTM B633, SC1. TYPE II NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-572-4252
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 91455A999 · 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: 2.3 MILLIMETERS MINIMUM AND 2.7 MILLIMETERS MAXIMUM MM
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: ZINC OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633, SC1. TYPE II NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 13.0 MILLIMETERS MINIMUM AND 13.2 MILLIMETERS MAXIMUM MM
•
OVERALL DIAMETER: 23.4 MILLIMETERS MINIMUM AND 24.0 MILLIMETERS MAXIMUM MM
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS2.3 MILLIMETERS MINIMUM AND 2.7 MILLIMETERS MAXIMUM MM
MATERIALSTEEL OVERALL
SURFACE TREATMENTZINC OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633, SC1. TYPE II NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL
CENTER HOLE SHAPE STYLEROUND
SPECIAL FEATURESMATERIAL LOW CARBON STEEL;OD MIN 23.48MM, MAX 24.00MM;ID MIN 13.00MM, MAX 13.27MM;THICKNESS MIN 2.30, MAX 2.70 MM
HOLE DIAMETER13.0 MILLIMETERS MINIMUM AND 13.2 MILLIMETERS MAXIMUM MM
OVERALL DIAMETER23.4 MILLIMETERS MINIMUM AND 24.0 MILLIMETERS MAXIMUM MM
PERIPHERAL SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
2202-900-002428Interchangeable
interchangeable cross-reference
interchangeable
MW6420000YZ0000Interchangeable
interchangeable cross-reference
interchangeable
2202-9-00001984Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91455A999?
91455A999 is a WASHER,FLAT.
What parts can replace 91455A999?
There are 3 known substitutes for 91455A999: 2202-900-002428, MW6420000YZ0000, 2202-9-00001984. Substitute compatibility should be verified for your specific system.
What is the NSN for 91455A999?
91455A999 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-572-4252. 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