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S810EA — WASHER,KEYWAY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S810EA: WASHER,KEYWAY.

The WASHER,KEYWAY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1561 OVERALL, hole_diameter: 1.312 INCHES MINIMUM AND 1.317 INCHES MAXIMUM IN, outside_diameter: 2.250 INCHES NOMINAL IN, material_thickness: 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN, internal_keyway_width: 0.124 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN, material_document_and_classification: MIL-S-890 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-281-2465, 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
S810EA
NSN: 5310-00-281-2465
FSC: 5310 — Nuts and Washers
CAGE: 59180 — CIRCOR PUMPS NORTH AMERICA LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 1561 OVERALL
hole_diameter1.312 INCHES MINIMUM AND 1.317 INCHES MAXIMUM IN
outside_diameter2.250 INCHES NOMINAL IN
material_thickness0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
internal_keyway_width0.124 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
internal_keyway_quantity1
material_document_and_classificationMIL-S-890 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_bottom_of_internal_keyway0.706 INCHES MINIMUM AND 0.716 INCHES MAXIMUM IN
NSN5310-00-281-2465
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S810EA · 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
•
DISTANCE FROM CENTERLINE TO BOTTOM OF INTERNAL KEYWAY: 0.706 INCHES MINIMUM AND 0.716 INCHES MAXIMUM IN
•
INTERNAL KEYWAY WIDTH: 0.124 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-890 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 2.250 INCHES NOMINAL IN
•
INTERNAL KEYWAY QUANTITY: 1
•
MATERIAL THICKNESS: 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1561 OVERALL
•
HOLE DIAMETER: 1.312 INCHES MINIMUM AND 1.317 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO BOTTOM OF INTERNAL KEYWAY0.706 INCHES MINIMUM AND 0.716 INCHES MAXIMUM IN
INTERNAL KEYWAY WIDTH0.124 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-890 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER2.250 INCHES NOMINAL IN
INTERNAL KEYWAY QUANTITY1
MATERIAL THICKNESS0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1561 OVERALL
HOLE DIAMETER1.312 INCHES MINIMUM AND 1.317 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
SG3314PC19Reference 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 S810EA?
S810EA is a WASHER,KEYWAY.
What parts can replace S810EA?
There is 1 known substitute for S810EA: SG3314PC19. Substitute compatibility should be verified for your specific system.
What is the NSN for S810EA?
S810EA is cataloged in the U.S. Government catalog under NSN 5310-00-281-2465. 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.