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PartsTable / COMPONENT / 20289
20289 ✓ Verified by PartsTable
Legrand · 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 MICROCIRCUIT,DIGITAL is a Legrand industrial component. Key specifications include width: 4.100 INCHES NOMINAL IN, diameter: 6.280 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, nut_style: SQUARE, body_width: 0.280 INCHES MAXIMUM IN, nut_height: 0.057 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-596-8202, 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
20289
NSN: 5310-00-596-8202
FSC: 5310
CAGE: 25734 — BOSCH SECURITY SYSTEMS, LLC (USA)
SPECIFICATIONS
width4.100 INCHES NOMINAL IN
diameter6.280 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
nut_styleSQUARE
body_width0.280 INCHES MAXIMUM IN
nut_height0.057 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
body_height0.180 INCHES NOMINAL IN
body_length0.785 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
blade_quantity32
style_designatorSTRAIGHT BLADES SINGLE WIDTH
NSN5310-00-596-8202
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 20289 · Legrand ⚠ 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
NUT STYLE: SQUARE
•
THREAD QUANTITY PER INCH: 56
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.086 INCHES IN
•
BEARING SURFACE TYPE: FLAT
•
NUT HEIGHT: 0.057 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.180 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NUT STYLESQUARE
THREAD QUANTITY PER INCH56
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.086 INCHES IN
BEARING SURFACE TYPEFLAT
NUT HEIGHT0.057 INCHES MINIMUM AND 0.066 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.180 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NONDEFINITIVE SPEC/STD DATAB TYPE AND 22 TABLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
MIL-S-933TYPEBInterchangeable
interchangeable cross-reference
interchangeable
3-4APC7Interchangeable
interchangeable cross-reference
interchangeable
3-4WPC7Interchangeable
interchangeable cross-reference
interchangeable
118-32ALT2PC4Interchangeable
interchangeable cross-reference
interchangeable
132926Interchangeable
interchangeable cross-reference
interchangeable
FFS92TYPE1STYLE1SInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20289?
20289 is a MICROCIRCUIT,DIGITAL manufactured by Legrand.
What parts can replace 20289?
There are 15 known substitutes for 20289: MIL-S-933TYPEB, 3-4APC7, 3-4WPC7 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20289?
20289 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-596-8202. 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