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6565-20-315-9101 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6565-20-315-9101: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, hole_diameter: 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN, hardness_rating: 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM, outside_diameter: 0.875 INCHES NOMINAL IN, external_prebent_key_width: 0.116 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, material_document_and_classification: MIL-S-6758 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-944-2601, 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
6565-20-315-9101
NSN: 5310-00-944-2601
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
hole_diameter0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
hardness_rating39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
outside_diameter0.875 INCHES NOMINAL IN
external_prebent_key_width0.116 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-6758 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-944-2601
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6565-20-315-9101 · 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: 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6758 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.875 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY WIDTH: 0.116 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 4130 OVERALL
•
HOLE DIAMETER: 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HARDNESS RATING39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6758 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.875 INCHES NOMINAL IN
EXTERNAL PREBENT KEY WIDTH0.116 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
MATERIALSTEEL COMP 4130 OVERALL
HOLE DIAMETER0.440 INCHES MINIMUM AND 0.450 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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6565-20-315-9101?
6565-20-315-9101 is a WASHER,KEY.
What is the NSN for 6565-20-315-9101?
6565-20-315-9101 is cataloged in the U.S. Government catalog under NSN 5310-00-944-2601. 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.