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EAB1900 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

EAB1900: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OVERALL, recess_angle: 90.0 DEGREES NOMINAL, recess_depth: 0.033 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN, hole_diameter: 0.387 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN, recess_diameter: 0.473 INCHES MINIMUM AND 0.479 INCHES MAXIMUM IN, outside_diameter: 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-209-2708, 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
EAB1900
NSN: 5310-00-209-2708
FSC: 5310 — Nuts and Washers
CAGE: 81996 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OVERALL
recess_angle90.0 DEGREES NOMINAL
recess_depth0.033 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
hole_diameter0.387 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
recess_diameter0.473 INCHES MINIMUM AND 0.479 INCHES MAXIMUM IN
outside_diameter0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN
style_designatorRECESSED
surface_treatmentOXIDE FILM OVERALL
material_thickness0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OR QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-209-2708
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: EAB1900 · 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
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OR QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN
•
RECESS DEPTH: 0.033 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.473 INCHES MINIMUM AND 0.479 INCHES MAXIMUM IN
•
SURFACE TREATMENT: OXIDE FILM OVERALL
•
MATERIAL: STEEL COMP 302 OR STEEL COMP 303 OVERALL
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE OR QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN
RECESS DEPTH0.033 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
MATERIAL THICKNESS0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
RECESS DIAMETER0.473 INCHES MINIMUM AND 0.479 INCHES MAXIMUM IN
SURFACE TREATMENTOXIDE FILM OVERALL
MATERIALSTEEL COMP 302 OR STEEL COMP 303 OVERALL
HOLE DIAMETER0.387 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN
RECESS ANGLE90.0 DEGREES NOMINAL
SUBSTITUTES & CROSS-REFERENCES 1
365637Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is EAB1900?
EAB1900 is a WASHER,RECESSED.
What parts can replace EAB1900?
There is 1 known substitute for EAB1900: 365637. Substitute compatibility should be verified for your specific system.
What is the NSN for EAB1900?
EAB1900 is cataloged in the U.S. Government catalog under NSN 5310-00-209-2708. 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.