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7219521 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7219521: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include width: 0.921 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN, material: STEEL OR STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OVERALL, thickness: 0.094 INCHES NOMINAL IN, hole_diameter: 0.531 INCHES NOMINAL IN, overall_diameter: 1.062 INCHES NOMINAL IN, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-569-7348, 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
7219521
NSN: 5310-00-569-7348
FSC: 5310 — Nuts and Washers
CAGE: 19204 — ARMY, UNITED STATES DEPARTMENT OF THE DBA ROCK ISLAND ARSENAL JMTC (USA)
SPECIFICATIONS
width0.921 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
materialSTEEL OR STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OVERALL
thickness0.094 INCHES NOMINAL IN
hole_diameter0.531 INCHES NOMINAL IN
overall_diameter1.062 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleDEE
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE AND QQ-S-766 FED SPEC 2ND MATERIAL RESPONSE AND QQ-S-766 FED SPEC 3RD MATERIAL RESPONSE AND QQ-S-766 FED SPEC 4TH MATERIAL RESPONSE OVERALL
NSN5310-00-569-7348
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7219521 · 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
•
OVERALL DIAMETER: 1.062 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE AND QQ-S-766 FED SPEC 2ND MATERIAL RESPONSE AND QQ-S-766 FED SPEC 3RD MATERIAL RESPONSE AND QQ-S-766 FED SPEC 4TH MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
PERIPHERAL SHAPE STYLE: DEE
•
WIDTH: 0.921 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
•
MATERIAL: STEEL OR STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.062 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE AND QQ-S-766 FED SPEC 2ND MATERIAL RESPONSE AND QQ-S-766 FED SPEC 3RD MATERIAL RESPONSE AND QQ-S-766 FED SPEC 4TH MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTPASSIVATE OVERALL
PERIPHERAL SHAPE STYLEDEE
WIDTH0.921 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
MATERIALSTEEL OR STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 316 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.531 INCHES NOMINAL IN
THICKNESS0.094 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7219521?
7219521 is a WASHER,FLAT.
What is the NSN for 7219521?
7219521 is cataloged in the U.S. Government catalog under NSN 5310-00-569-7348. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.