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C45A28 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

C45A28: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: COPPER OVERALL, thickness: 0.050 INCHES NOMINAL IN, hole_diameter: 0.214 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN, overall_diameter: 0.331 INCHES NOMINAL IN, surface_treatment: CADMIUM OR ZINC OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-262-6219, 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
C45A28
NSN: 5310-00-262-6219
FSC: 5310 — Nuts and Washers
CAGE: 58588 — SURFACE COMBUSTION INC (USA)
SPECIFICATIONS
materialCOPPER OVERALL
thickness0.050 INCHES NOMINAL IN
hole_diameter0.214 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
overall_diameter0.331 INCHES NOMINAL IN
surface_treatmentCADMIUM OR ZINC OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-262-6219
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: C45A28 · 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: 0.331 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: COPPER OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.214 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
•
THICKNESS: 0.050 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.331 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALCOPPER OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.214 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN
THICKNESS0.050 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 1
9126262-01Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C45A28?
C45A28 is a WASHER,FLAT.
What parts can replace C45A28?
There is 1 known substitute for C45A28: 9126262-01. Substitute compatibility should be verified for your specific system.
What is the NSN for C45A28?
C45A28 is cataloged in the U.S. Government catalog under NSN 5310-00-262-6219. 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.