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1-130-218-01 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1-130-218-01: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OVERALL, thickness: 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN, hole_diameter: 0.252 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES TOP, hardness_rating: 63.5 ROCKWELL A MINIMUM AND 68.0 ROCKWELL A MAXIMUM, overall_diameter: 0.440 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-902-4098, 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
1-130-218-01
NSN: 5310-00-902-4098
FSC: 5310 — Nuts and Washers
CAGE: 78U39 — OZARK AEROWORKS LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
thickness0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
hole_diameter0.252 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES TOP
hardness_rating63.5 ROCKWELL A MINIMUM AND 68.0 ROCKWELL A MAXIMUM
overall_diameter0.440 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS 5637 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-902-4098
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1-130-218-01 · 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 FINISH: 63.0 MICROINCHES BOTTOM
•
OVERALL DIAMETER: 0.440 INCHES NOMINAL IN
•
HARDNESS RATING: 63.5 ROCKWELL A MINIMUM AND 68.0 ROCKWELL A MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5637 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES BOTTOM
SURFACE FINISH63.0 MICROINCHES TOP
OVERALL DIAMETER0.440 INCHES NOMINAL IN
HARDNESS RATING63.5 ROCKWELL A MINIMUM AND 68.0 ROCKWELL A MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5637 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTPASSIVATE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 302 OVERALL
CENTER HOLE SHAPE STYLEROUND
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 1-130-218-01?
1-130-218-01 is a WASHER,FLAT.
What is the NSN for 1-130-218-01?
1-130-218-01 is cataloged in the U.S. Government catalog under NSN 5310-00-902-4098. 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.