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20DE16 ✓ 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,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.625 INCHES NOMINAL IN, outside_diameter: 1.031 INCHES NOMINAL IN, style_designator: SHOULDERED, shoulder_diameter: 0.984 INCHES NOMINAL IN, material_document_and_classification: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-521-4407, 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
20DE16
NSN: 5310-00-521-4407
FSC: 5310
CAGE: 59875 — EATON CORP DBA EATON AEROSPACE JACKSON (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.625 INCHES NOMINAL IN
outside_diameter1.031 INCHES NOMINAL IN
style_designatorSHOULDERED
shoulder_diameter0.984 INCHES NOMINAL IN
material_document_and_classificationQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-521-4407
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 20DE16 · 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
•
MATERIAL: STEEL OVERALL
•
OUTSIDE DIAMETER: 1.031 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
HOLE DIAMETER: 0.625 INCHES NOMINAL IN
•
SHOULDER DIAMETER: 0.984 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
OUTSIDE DIAMETER1.031 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDERED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
HOLE DIAMETER0.625 INCHES NOMINAL IN
SHOULDER DIAMETER0.984 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
LM111JG/883Interchangeable
interchangeable cross-reference
interchangeable
933A200-2Interchangeable
interchangeable cross-reference
interchangeable
LM111J-8/883BInterchangeable
interchangeable cross-reference
interchangeable
344590Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20DE16?
20DE16 is a WASHER,SHOULDERED.
What parts can replace 20DE16?
There are 4 known substitutes for 20DE16: LM111JG/883, 933A200-2, LM111J-8/883B and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20DE16?
20DE16 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-521-4407. 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