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R30399 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

R30399: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1019 OVERALL, thickness: 0.250 INCHES NOMINAL IN, hole_diameter: 1.031 INCHES NOMINAL IN, heat_treatment: HOT ROLLED, hardness_rating: 79.0 ROCKWELL A MINIMUM, overall_diameter: 2.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-196-0245, 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
R30399
NSN: 5310-01-196-0245
FSC: 5310 — Nuts and Washers
CAGE: 75160 — DEERE & CO (USA)
SPECIFICATIONS
materialSTEEL COMP 1019 OVERALL
thickness0.250 INCHES NOMINAL IN
hole_diameter1.031 INCHES NOMINAL IN
heat_treatmentHOT ROLLED
hardness_rating79.0 ROCKWELL A MINIMUM
overall_diameter2.250 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationJDM 1019F,FSCM 75160 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-196-0245
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: R30399 · 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: 2.250 INCHES NOMINAL IN
•
HEAT TREATMENT: HOT ROLLED
•
HARDNESS RATING: 79.0 ROCKWELL A MINIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: JDM 1019F,FSCM 75160 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 1019 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER2.250 INCHES NOMINAL IN
HEAT TREATMENTHOT ROLLED
HARDNESS RATING79.0 ROCKWELL A MINIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONJDM 1019F,FSCM 75160 MFR REF SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 1019 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.031 INCHES NOMINAL IN
THICKNESS0.250 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

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 R30399?
R30399 is a WASHER,FLAT.
What is the NSN for R30399?
R30399 is cataloged in the U.S. Government catalog under NSN 5310-01-196-0245. 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.