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S-813EA — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S-813EA: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OR STEEL COMP 1015 OVERALL, nut_style: ROUND, nut_diameter: 2.500 INCHES NOMINAL IN, thread_class: 3B, nut_thickness: 0.438 INCHES NOMINAL IN, thread_series: UNS. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-638-1164, 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
S-813EA
NSN: 5310-00-638-1164
NIINs: 006381164, 014071699
FSC: 5310 — Nuts and Washers
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL COMP 1010 OR STEEL COMP 1015 OVERALL
nut_styleROUND
nut_diameter2.500 INCHES NOMINAL IN
thread_class3B
nut_thickness0.438 INCHES NOMINAL IN
thread_seriesUNS
thread_directionRIGHT-HAND
drive_point_depth0.250 INCHES NOMINAL IN
nominal_thread_size0.688 INCHES IN
counterbore_diameter2.125 INCHES NOMINAL NUT IN
drive_point_diameter0.250 INCHES NOMINAL IN
drive_point_quantity2
NSN5310-00-638-1164
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S-813EA · 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
•
THREAD SERIES: UNS
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-16782 MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
NUT COUNTERBORE DEPTH: 0.031 INCHES NOMINAL NUT IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.688 INCHES IN
•
NUT DIAMETER: 2.500 INCHES NOMINAL IN
•
COUNTERBORE DIAMETER: 2.125 INCHES NOMINAL NUT IN
•
DRIVE POINT DEPTH: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-16782 MIL SPEC ALL MATERIAL RESPONSES OVERALL
NUT COUNTERBORE DEPTH0.031 INCHES NOMINAL NUT IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.688 INCHES IN
NUT DIAMETER2.500 INCHES NOMINAL IN
COUNTERBORE DIAMETER2.125 INCHES NOMINAL NUT IN
DRIVE POINT DEPTH0.250 INCHES NOMINAL IN
NUT THICKNESS0.438 INCHES NOMINAL IN
DRIVE POINT DIAMETER0.250 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
S813EA9219Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 S-813EA?
S-813EA is a NUT,PLAIN,ROUND.
What parts can replace S-813EA?
There is 1 known substitute for S-813EA: S813EA9219. Substitute compatibility should be verified for your specific system.
What is the NSN for S-813EA?
S-813EA is cataloged in the U.S. Government catalog under NSN 5310-00-638-1164. 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.