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PartsTable / COMPONENT / 210420-1
210420-1 ✓ 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 POLYHEXAMETHYLENE ADIPAMIDE OVERALL, thickness: 0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN, hole_diameter: 0.506 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN, overall_diameter: 0.900 INCHES MINIMUM AND 0.960 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 5310-00-195-6463, 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
210420-1
NSN: 5310-00-195-6463
FSC: 5310
CAGE: 19790 — DATA PRODUCTS CORP (USA)
SPECIFICATIONS
materialPLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL
thickness0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
hole_diameter0.506 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN
overall_diameter0.900 INCHES MINIMUM AND 0.960 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationL-P-410 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-195-6463
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 210420-1 · 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
•
MATERIAL: PLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: L-P-410 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THICKNESS: 0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
•
OVERALL DIAMETER: 0.900 INCHES MINIMUM AND 0.960 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.506 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL SHAPE STYLEROUND
MATERIALPLASTIC POLYHEXAMETHYLENE ADIPAMIDE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONL-P-410 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THICKNESS0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
OVERALL DIAMETER0.900 INCHES MINIMUM AND 0.960 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.506 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
RC20GF562JInterchangeable
interchangeable cross-reference
interchangeable
263-818-184Interchangeable
interchangeable cross-reference
interchangeable
105M146M5625Interchangeable
interchangeable cross-reference
interchangeable
MIL-R-39008/5Interchangeable
interchangeable cross-reference
interchangeable
1736134Interchangeable
interchangeable cross-reference
interchangeable
400-812-067Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 210420-1?
210420-1 is a WASHER,FLAT.
What parts can replace 210420-1?
There are 6 known substitutes for 210420-1: RC20GF562J, 263-818-184, 105M146M5625 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 210420-1?
210420-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-195-6463. 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