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4M284-22 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4M284-22: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OVERALL, thickness: 0.100 INCHES NOMINAL IN, hole_diameter: 1.385 INCHES MINIMUM AND 1.400 INCHES MAXIMUM IN, overall_diameter: 2.250 INCHES NOMINAL IN, special_features: WASHER-PLAIN AND COUNTERSUNK,17-4PH CRES,1200 DEGREE F, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-480-4972, 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
4M284-22
NSN: 5310-01-480-4972
FSC: 5310 — Nuts and Washers
CAGE: 59570 — TRICO MANUFACTURING INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 630 OVERALL
thickness0.100 INCHES NOMINAL IN
hole_diameter1.385 INCHES MINIMUM AND 1.400 INCHES MAXIMUM IN
overall_diameter2.250 INCHES NOMINAL IN
special_featuresWASHER-PLAIN AND COUNTERSUNK,17-4PH CRES,1200 DEGREE F
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationF18 E/F
cross-sectional_shape_styleRECTANGULAR
criticality_code_justificationAGAV
material_document_and_classificationAMS 5604,CONDITION H1025 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-480-4972
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4M284-22 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 2.250 INCHES NOMINAL IN
•
CRITICALITY CODE JUSTIFICATION: AGAV
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5604,CONDITION H1025 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
COLOR: BROWN OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER2.250 INCHES NOMINAL IN
CRITICALITY CODE JUSTIFICATIONAGAV
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5604,CONDITION H1025 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
COLORBROWN OVERALL
SPECIAL FEATURESWASHER-PLAIN AND COUNTERSUNK,17-4PH CRES,1200 DEGREE F
SURFACE TREATMENTPASSIVATE OVERALL
PERIPHERAL SHAPE STYLEROUND
END ITEM IDENTIFICATIONF18 E/F
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
T4M284-22Same 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 4M284-22?
4M284-22 is a WASHER,FLAT.
What parts can replace 4M284-22?
There is 1 known substitute for 4M284-22: T4M284-22. Substitute compatibility should be verified for your specific system.
What is the NSN for 4M284-22?
4M284-22 is cataloged in the U.S. Government catalog under NSN 5310-01-480-4972. 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.