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CU170664 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

CU170664: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include thickness: 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN, hole_diameter: 0.406 INCHES NOMINAL IN, overall_diameter: 1.235 INCHES MINIMUM AND 1.255 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND, cross-sectional_shape_style: RECTANGULAR. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-486-2507, 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
CU170664
NSN: 5310-00-486-2507
FSC: 5310 — Nuts and Washers
CAGE: Z0009 — INTERNATIONAL TRUCKS AUSTRALIA LIMITED (AUS)
SPECIFICATIONS
thickness0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
hole_diameter0.406 INCHES NOMINAL IN
overall_diameter1.235 INCHES MINIMUM AND 1.255 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-486-2507
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: CU170664 · 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: 1.235 INCHES MINIMUM AND 1.255 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.406 INCHES NOMINAL IN
•
THICKNESS: 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.235 INCHES MINIMUM AND 1.255 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.406 INCHES NOMINAL IN
THICKNESS0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
170664Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is CU170664?
CU170664 is a WASHER,FLAT.
What parts can replace CU170664?
There is 1 known substitute for CU170664: 170664. Substitute compatibility should be verified for your specific system.
What is the NSN for CU170664?
CU170664 is cataloged in the U.S. Government catalog under NSN 5310-00-486-2507. 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.