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66-20192-1 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

66-20192-1: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include thickness: 0.063 INCHES NOMINAL IN, hole_diameter: 0.330 INCHES NOMINAL IN, overall_diameter: 0.690 INCHES NOMINAL IN, special_features: OUTSIDE CORNER RADIUS ON ONE SIDE 0.063 IN. RADIUS IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND.

This part is cataloged in the U.S. Government catalog under NSN 5310-01-021-0619, 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
66-20192-1
NSN: 5310-01-021-0619
FSC: 5310 — Nuts and Washers
CAGE: 17765 — THE BOEING COMPANY DIV COMMERCIAL (USA)
SPECIFICATIONS
thickness0.063 INCHES NOMINAL IN
hole_diameter0.330 INCHES NOMINAL IN
overall_diameter0.690 INCHES NOMINAL IN
special_featuresOUTSIDE CORNER RADIUS ON ONE SIDE 0.063 IN. RADIUS IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-01-021-0619
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 66-20192-1 · 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: 0.690 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.330 INCHES NOMINAL IN
•
THICKNESS: 0.063 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.690 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SPECIAL FEATURESOUTSIDE CORNER RADIUS ON ONE SIDE 0.063 IN. RADIUS IN
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.330 INCHES NOMINAL IN
THICKNESS0.063 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 66-20192-1?
66-20192-1 is a WASHER,FLAT.
What is the NSN for 66-20192-1?
66-20192-1 is cataloged in the U.S. Government catalog under NSN 5310-01-021-0619. 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.