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PartsTable / COMPONENT / W0721-00-021
W0721-00-021 ✓ 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 KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_width: 40.0 MILLIMETERS NOMINAL MM, overall_height: 22.0 MILLIMETERS NOMINAL MM, overall_length: 190.0 MILLIMETERS NOMINAL MM, style_designator: PLAIN, material_document_and_classification: ST 50-1K DIN 1652 NATIONAL 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 5315-01-421-2059, 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
W0721-00-021
NSN: 5315-01-421-2059
FSC: 5315
CAGE: N1248 — KRUGE AS (NOR)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width40.0 MILLIMETERS NOMINAL MM
overall_height22.0 MILLIMETERS NOMINAL MM
overall_length190.0 MILLIMETERS NOMINAL MM
style_designatorPLAIN
material_document_and_classificationST 50-1K DIN 1652 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5315-01-421-2059
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: W0721-00-021 · 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
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL: STEEL OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ST 50-1K DIN 1652 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH40.0 MILLIMETERS NOMINAL MM
OVERALL LENGTH190.0 MILLIMETERS NOMINAL MM
STYLE DESIGNATORPLAIN
MATERIALSTEEL OVERALL
OVERALL HEIGHT22.0 MILLIMETERS NOMINAL MM
MATERIAL DOCUMENT AND CLASSIFICATIONST 50-1K DIN 1652 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
757863Interchangeable
interchangeable cross-reference
interchangeable
32345Interchangeable
interchangeable cross-reference
interchangeable
6515NCM082704Interchangeable
interchangeable cross-reference
interchangeable
323.45Interchangeable
interchangeable cross-reference
interchangeable
8730Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is W0721-00-021?
W0721-00-021 is a KEY,MACHINE.
What parts can replace W0721-00-021?
There are 5 known substitutes for W0721-00-021: 757863, 32345, 6515NCM082704 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for W0721-00-021?
W0721-00-021 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-421-2059. 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