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9521864 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

9521864: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 0.315 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN, hardness_rating: 27.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM, recess_diameter: 0.396 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN, outside_diameter: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-680-7855, 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
9521864
NSN: 5310-00-680-7855
FSC: 5310 — Nuts and Washers
CAGE: 73842 — GOODYEAR TIRE AND RUBBER CO THE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter0.315 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
hardness_rating27.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
recess_diameter0.396 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
outside_diameter0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
style_designatorRECESSED
material_thickness0.104 INCHES MINIMUM AND 0.114 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-680-7855
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 9521864 · 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
•
HARDNESS RATING: 27.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: RECESSED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.104 INCHES MINIMUM AND 0.114 INCHES MAXIMUM IN
•
RECESS DIAMETER: 0.396 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.315 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HARDNESS RATING27.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
MATERIAL THICKNESS0.104 INCHES MINIMUM AND 0.114 INCHES MAXIMUM IN
RECESS DIAMETER0.396 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
HOLE DIAMETER0.315 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
RECESS ANGLE90.0 DEGREES NOMINAL
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 9521864?
9521864 is a WASHER,RECESSED.
What is the NSN for 9521864?
9521864 is cataloged in the U.S. Government catalog under NSN 5310-00-680-7855. 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.