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A033-501-2987 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A033-501-2987: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: WOOL OVERALL, thickness: 0.156 INCHES NOMINAL IN, hole_diameter: 1.344 INCHES NOMINAL IN, overall_diameter: 1.812 INCHES NOMINAL IN, special_features: MILDREW PROOFED IN ACCORD/W MIL-T-2312, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-501-2987, 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
A033-501-2987
NSN: 5310-00-501-2987
FSC: 5310 — Nuts and Washers
CAGE: A00AM — E.C.A ETABLISSEMENT CENTRAL DES APPROVISIONNEMENTS DES FORCES ARMEES ROYALES
SPECIFICATIONS
materialWOOL OVERALL
thickness0.156 INCHES NOMINAL IN
hole_diameter1.344 INCHES NOMINAL IN
overall_diameter1.812 INCHES NOMINAL IN
special_featuresMILDREW PROOFED IN ACCORD/W MIL-T-2312
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-501-2987
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A033-501-2987 · 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: 1.812 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: WOOL OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 1.344 INCHES NOMINAL IN
•
THICKNESS: 0.156 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.812 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SPECIAL FEATURESMILDREW PROOFED IN ACCORD/W MIL-T-2312
PERIPHERAL SHAPE STYLEROUND
MATERIALWOOL OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.344 INCHES NOMINAL IN
THICKNESS0.156 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
A12987Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A033-501-2987?
A033-501-2987 is a WASHER,FLAT.
What parts can replace A033-501-2987?
There is 1 known substitute for A033-501-2987: A12987. Substitute compatibility should be verified for your specific system.
What is the NSN for A033-501-2987?
A033-501-2987 is cataloged in the U.S. Government catalog under NSN 5310-00-501-2987. 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.