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PartsTable / COMPONENT / J1081DRAWING1549
J1081DRAWING1549 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN, hole_diameter: 1.063 INCHES MINIMUM AND 1.187 INCHES MAXIMUM IN, surface_treatment: ZINC OVERALL, width_across_flats: 3.812 INCHES MINIMUM AND 4.188 INCHES MAXIMUM IN, peripheral_shape_style: SQUARE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-285-1524, 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
J1081DRAWING1549
NSN: 5310-00-285-1524
FSC: 5310
CAGE: 73913 — JOSLYN MFG AND SUPPLY CO ATLANTIC REGION
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
hole_diameter1.063 INCHES MINIMUM AND 1.187 INCHES MAXIMUM IN
surface_treatmentZINC OVERALL
width_across_flats3.812 INCHES MINIMUM AND 4.188 INCHES MAXIMUM IN
peripheral_shape_styleSQUARE
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-285-1524
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: J1081DRAWING1549 · 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
•
WIDTH ACROSS FLATS: 3.812 INCHES MINIMUM AND 4.188 INCHES MAXIMUM IN
•
HOLE DIAMETER: 1.063 INCHES MINIMUM AND 1.187 INCHES MAXIMUM IN
•
THICKNESS: 0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ZINC OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
CENTER HOLE SHAPE STYLE: ROUND
•
PERIPHERAL SHAPE STYLE: SQUARE
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS3.812 INCHES MINIMUM AND 4.188 INCHES MAXIMUM IN
HOLE DIAMETER1.063 INCHES MINIMUM AND 1.187 INCHES MAXIMUM IN
THICKNESS0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
SURFACE TREATMENTZINC OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
CENTER HOLE SHAPE STYLEROUND
PERIPHERAL SHAPE STYLESQUARE
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
EE31980Interchangeable
interchangeable cross-reference
interchangeable
7825NH8178455Interchangeable
interchangeable cross-reference
interchangeable
8920-0001Interchangeable
interchangeable cross-reference
interchangeable
533967Interchangeable
interchangeable cross-reference
interchangeable
7820Interchangeable
interchangeable cross-reference
interchangeable
5368Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is J1081DRAWING1549?
J1081DRAWING1549 is a WASHER,FLAT.
What parts can replace J1081DRAWING1549?
There are 9 known substitutes for J1081DRAWING1549: EE31980, 7825NH8178455, 8920-0001 and 6 more. Substitute compatibility should be verified for your specific system.
Is J1081DRAWING1549 still available?
J1081DRAWING1549 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026