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6510-31-102-7101 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6510-31-102-7101: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 301 OVERALL, hole_diameter: 2.842 INCHES MINIMUM AND 2.852 INCHES MAXIMUM IN, outside_diameter: 3.375 INCHES MINIMUM AND 3.395 INCHES MAXIMUM IN, special_features: KEYS PRE-BENT 45 DEGREES, style_designator: KEY, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-912-2872, 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
6510-31-102-7101
NSN: 5310-00-912-2872
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 301 OVERALL
hole_diameter2.842 INCHES MINIMUM AND 2.852 INCHES MAXIMUM IN
outside_diameter3.375 INCHES MINIMUM AND 3.395 INCHES MAXIMUM IN
special_featuresKEYS PRE-BENT 45 DEGREES
style_designatorKEY
surface_treatmentPASSIVATE OVERALL
material_thickness0.063 INCHES NOMINAL IN
width_between_flats2.628 INCHES MINIMUM AND 2.630 INCHES MAXIMUM IN
external_key_quantity19
external_straight_key_width0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
overall_distance_including_keys3.892 INCHES MINIMUM AND 3.922 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-5059 ANNEALED MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-912-2872
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6510-31-102-7101 · 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
•
OVERALL DISTANCE INCLUDING KEYS: 3.892 INCHES MINIMUM AND 3.922 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059 ANNEALED MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 3.375 INCHES MINIMUM AND 3.395 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.063 INCHES NOMINAL IN
•
WIDTH BETWEEN FLATS: 2.628 INCHES MINIMUM AND 2.630 INCHES MAXIMUM IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 19
TECHNICAL CHARACTERISTICS
OVERALL DISTANCE INCLUDING KEYS3.892 INCHES MINIMUM AND 3.922 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059 ANNEALED MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER3.375 INCHES MINIMUM AND 3.395 INCHES MAXIMUM IN
MATERIAL THICKNESS0.063 INCHES NOMINAL IN
WIDTH BETWEEN FLATS2.628 INCHES MINIMUM AND 2.630 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY WIDTH0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY19
SPECIAL FEATURESKEYS PRE-BENT 45 DEGREES
SURFACE TREATMENTPASSIVATE 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

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 6510-31-102-7101?
6510-31-102-7101 is a WASHER,KEY.
What is the NSN for 6510-31-102-7101?
6510-31-102-7101 is cataloged in the U.S. Government catalog under NSN 5310-00-912-2872. 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.