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002786-1 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

002786-1: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 OVERALL, thickness: 0.187 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN, overall_diameter: 1.990 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL, peripheral_shape_style: ROUND, center_hole_shape_style: HEXAGON. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-006-3918, 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
002786-1
NSN: 5310-01-006-3918
FSC: 5310 — Nuts and Washers
CAGE: 14153 — DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA (USA)
SPECIFICATIONS
materialSTEEL COMP 304 OVERALL
thickness0.187 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
overall_diameter1.990 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleHEXAGON
hole_width_across_flats1.007 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-766 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-006-3918
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 002786-1 · 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: 1.990 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 304 OVERALL
•
HOLE WIDTH ACROSS FLATS: 1.007 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.990 INCHES MINIMUM AND 2.000 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTPASSIVATE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 304 OVERALL
HOLE WIDTH ACROSS FLATS1.007 INCHES MINIMUM AND 1.020 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEHEXAGON
THICKNESS0.187 INCHES MINIMUM AND 0.188 INCHES MAXIMUM 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 1
5310PL1240769Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 002786-1?
002786-1 is a WASHER,FLAT.
What parts can replace 002786-1?
There is 1 known substitute for 002786-1: 5310PL1240769. Substitute compatibility should be verified for your specific system.
What is the NSN for 002786-1?
002786-1 is cataloged in the U.S. Government catalog under NSN 5310-01-006-3918. 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.