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220899 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

220899: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, thickness: 0.016 INCHES MINIMUM AND 0.026 INCHES MAXIMUM IN, hole_diameter: 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN, overall_diameter: 0.312 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-186-7431, 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
220899
NSN: 5310-00-186-7431
FSC: 5310 — Nuts and Washers
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
thickness0.016 INCHES MINIMUM AND 0.026 INCHES MAXIMUM IN
hole_diameter0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
overall_diameter0.312 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-186-7431
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 220899 · 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: 0.312 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: COPPER ALLOY OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
•
THICKNESS: 0.016 INCHES MINIMUM AND 0.026 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.312 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALCOPPER ALLOY OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
THICKNESS0.016 INCHES MINIMUM AND 0.026 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
99837Reference document
Same NSN cross-reference
Reference document — Secondary reference
97396-20Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 220899?
220899 is a WASHER,FLAT.
What parts can replace 220899?
There are 2 known substitutes for 220899: 99837, 97396-20. Substitute compatibility should be verified for your specific system.
What is the NSN for 220899?
220899 is cataloged in the U.S. Government catalog under NSN 5310-00-186-7431. 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.