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Technical Data Sheet
PartsTable / COMPONENT / 1728-02-P
1728-02-P ✓ 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,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 410 OVERALL, hole_diameter: 0.640 INCHES MINIMUM AND 0.640 INCHES MINIMUM AND 0.659 INCHES MAXIMUM0.659 INCHES MAXIMUM IN, outside_diameter: 0.867 INCHES MINIMUM AND 0.867 INCHES MINIMUM AND 0.888 INCHES MAXIMUM0.888 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, material_thickness: 0.019 INCHES MINIMUM AND 0.019 INCHES MINIMUM AND 0.025 INCHES MAXIMUM0.025 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 5310-01-072-9180, 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
1728-02-P
NSN: 5310-01-072-9180
FSC: 5310
CAGE: 78189 — ITW SHAKEPROOF AUTOMOTIVE PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
hole_diameter0.640 INCHES MINIMUM AND 0.640 INCHES MINIMUM AND 0.659 INCHES MAXIMUM0.659 INCHES MAXIMUM IN
outside_diameter0.867 INCHES MINIMUM AND 0.867 INCHES MINIMUM AND 0.888 INCHES MAXIMUM0.888 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
material_thickness0.019 INCHES MINIMUM AND 0.019 INCHES MINIMUM AND 0.025 INCHES MAXIMUM0.025 INCHES MAXIMUM IN
NSN5310-01-072-9180
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1728-02-P · 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
•
OUTSIDE DIAMETER: 0.867 INCHES MINIMUM AND 0.867 INCHES MINIMUM AND 0.888 INCHES MAXIMUM0.888 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
MATERIAL THICKNESS: 0.019 INCHES MINIMUM AND 0.019 INCHES MINIMUM AND 0.025 INCHES MAXIMUM0.025 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 410 OVERALL
•
HOLE DIAMETER: 0.640 INCHES MINIMUM AND 0.640 INCHES MINIMUM AND 0.659 INCHES MAXIMUM0.659 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.867 INCHES MINIMUM AND 0.867 INCHES MINIMUM AND 0.888 INCHES MAXIMUM0.888 INCHES MAXIMUM IN
STYLE DESIGNATORFLAT INTERNAL TEETH
MATERIAL THICKNESS0.019 INCHES MINIMUM AND 0.019 INCHES MINIMUM AND 0.025 INCHES MAXIMUM0.025 INCHES MAXIMUM IN
MATERIALSTEEL COMP 410 OVERALL
HOLE DIAMETER0.640 INCHES MINIMUM AND 0.640 INCHES MINIMUM AND 0.659 INCHES MAXIMUM0.659 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
BL107804Interchangeable
interchangeable cross-reference
interchangeable
368-4505-2Interchangeable
interchangeable cross-reference
interchangeable
BL107804ISSUE1Interchangeable
interchangeable cross-reference
interchangeable
54017AInterchangeable
interchangeable cross-reference
interchangeable
90030Interchangeable
interchangeable cross-reference
interchangeable
805192-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1728-02-P?
1728-02-P is a WASHER,LOCK.
What parts can replace 1728-02-P?
There are 12 known substitutes for 1728-02-P: BL107804, 368-4505-2, BL107804ISSUE1 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1728-02-P?
1728-02-P is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-072-9180. 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