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10904953 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

10904953: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include thickness: 0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN, hole_diameter: 1.625 INCHES NOMINAL IN, heat_treatment: QUENCHED AND TEMPERED, surface_finish: 63.0 MICROINCHES TOP, hardness_rating: 89.3 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.8 ROCKWELL SUPERFICIAL 15-N MAXIMUM, overall_diameter: 2.875 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-987-7568, 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
10904953
NSN: 5310-00-987-7568
FSC: 5310 — Nuts and Washers
CAGE: 19204 — ARMY, UNITED STATES DEPARTMENT OF THE DBA ROCK ISLAND ARSENAL JMTC (USA)
SPECIFICATIONS
materialSTEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OR STEEL COMP MT1010 OR STEEL COMP MT1015 OR STEEL COMP MT1020 OVERALL
thickness0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
hole_diameter1.625 INCHES NOMINAL IN
heat_treatmentQUENCHED AND TEMPERED
surface_finish63.0 MICROINCHES TOP
hardness_rating89.3 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.8 ROCKWELL SUPERFICIAL 15-N MAXIMUM
overall_diameter2.875 INCHES NOMINAL IN
features_providedCASEHARDENED
surface_treatmentPHOSPHATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-987-7568
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 10904953 · 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
•
SURFACE FINISH: 63.0 MICROINCHES BOTTOM
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-16232 TY M CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 2.875 INCHES NOMINAL IN
•
HEAT TREATMENT: QUENCHED AND TEMPERED
•
HARDNESS RATING: 89.3 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.8 ROCKWELL SUPERFICIAL 15-N MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-698 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-698 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-698 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-698 FED SPEC 4TH MATERIAL RESPONSE OR QQ-S-698 FED SPEC 5TH MATERIAL RESPONSE OR QQ-T-830 FED SPEC 6TH MATERIAL RESPONSE OR QQ-T-830 FED SPEC 7TH MATERIAL RESPONSE OR QQ-T-830 FED SPEC 8TH MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES BOTTOM
SURFACE FINISH63.0 MICROINCHES TOP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-16232 TY M CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER2.875 INCHES NOMINAL IN
HEAT TREATMENTQUENCHED AND TEMPERED
HARDNESS RATING89.3 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.8 ROCKWELL SUPERFICIAL 15-N MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-698 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-698 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-698 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-698 FED SPEC 4TH MATERIAL RESPONSE OR QQ-S-698 FED SPEC 5TH MATERIAL RESPONSE OR QQ-T-830 FED SPEC 6TH MATERIAL RESPONSE OR QQ-T-830 FED SPEC 7TH MATERIAL RESPONSE OR QQ-T-830 FED SPEC 8TH MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
FEATURES PROVIDEDCASEHARDENED
SURFACE TREATMENTPHOSPHATE OVERALL
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
5310009877568Reference 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 10904953?
10904953 is a WASHER,FLAT.
What parts can replace 10904953?
There is 1 known substitute for 10904953: 5310009877568. Substitute compatibility should be verified for your specific system.
What is the NSN for 10904953?
10904953 is cataloged in the U.S. Government catalog under NSN 5310-00-987-7568. 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.