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PartsTable / COMPONENT / 1521P5
1521P5 ✓ 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: STEEL OVERALL, thickness: 0.0270 INCHES MINIMUM AND 0.0370 INCHES MAXIMUM IN, hole_diameter: 0.189 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN, overall_diameter: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN, surface_treatment: CADMIUM OVERALL, peripheral_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 5310-00-285-1488, 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
1521P5
NSN: 5310-00-285-1488
FSC: 5310
CAGE: 06650 — BELL AND HOWELL PHILLIPSBURG CO CORPORATE OFFICES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.0270 INCHES MINIMUM AND 0.0370 INCHES MAXIMUM IN
hole_diameter0.189 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN
overall_diameter0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-285-1488
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1521P5 · 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
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.0270 INCHES MINIMUM AND 0.0370 INCHES MAXIMUM IN
•
OVERALL DIAMETER: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
HOLE DIAMETER: 0.189 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.0270 INCHES MINIMUM AND 0.0370 INCHES MAXIMUM IN
OVERALL DIAMETER0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OVERALL
HOLE DIAMETER0.189 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
N5558VInterchangeable
interchangeable cross-reference
interchangeable
IC55AInterchangeable
interchangeable cross-reference
interchangeable
399-723Interchangeable
interchangeable cross-reference
interchangeable
FF-W-92Interchangeable
Same NIIN cross-reference
interchangeable
601521Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1521P5?
1521P5 is a WASHER,FLAT.
What parts can replace 1521P5?
There are 5 known substitutes for 1521P5: N5558V, IC55A, 399-723 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1521P5?
1521P5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-285-1488. 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