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64111405-B8 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

64111405-B8: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.4994 INCHES MINIMUM AND 0.5005 INCHES MAXIMUM IN, outside_diameter: 0.880 INCHES NOMINAL IN, style_designator: RECESSED BOTH SIDES, countersink_angle: 90.0 DEGREES NOMINAL, material_thickness: 0.125 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-436-9977, 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
64111405-B8
NSN: 5310-01-436-9977
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.4994 INCHES MINIMUM AND 0.5005 INCHES MAXIMUM IN
outside_diameter0.880 INCHES NOMINAL IN
style_designatorRECESSED BOTH SIDES
countersink_angle90.0 DEGREES NOMINAL
material_thickness0.125 INCHES NOMINAL IN
bottom_recess_angle90.0 DEGREES NOMINAL
NSN5310-01-436-9977
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 64111405-B8 · 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 BOTH SIDES
•
OUTSIDE DIAMETER: 0.880 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
•
BOTTOM RECESS ANGLE: 90.0 DEGREES NOMINAL
•
COUNTERSINK ANGLE: 90.0 DEGREES NOMINAL
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.4994 INCHES MINIMUM AND 0.5005 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORRECESSED BOTH SIDES
OUTSIDE DIAMETER0.880 INCHES NOMINAL IN
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
BOTTOM RECESS ANGLE90.0 DEGREES NOMINAL
COUNTERSINK ANGLE90.0 DEGREES NOMINAL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.4994 INCHES MINIMUM AND 0.5005 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

No substitute or cross-reference records for this part.

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 64111405-B8?
64111405-B8 is a WASHER,RECESSED.
What is the NSN for 64111405-B8?
64111405-B8 is cataloged in the U.S. Government catalog under NSN 5310-01-436-9977. 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.