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6515-50-012-5101 — WASHER,CONCAVE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6515-50-012-5101: WASHER,CONCAVE.

The WASHER,CONCAVE is a the manufacturer industrial component. Key specifications include radius: 3.820 INCHES NOMINAL IN, material: TITANIUM ALLOY OVERALL, recess_depth: 0.010 INCHES NOMINAL IN, hole_diameter: 0.688 INCHES NOMINAL IN, surface_finish: 32.0 MICROINCHES BOTTOM, outside_diameter: 1.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-286-2559, 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
6515-50-012-5101
NSN: 5310-01-286-2559
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
radius3.820 INCHES NOMINAL IN
materialTITANIUM ALLOY OVERALL
recess_depth0.010 INCHES NOMINAL IN
hole_diameter0.688 INCHES NOMINAL IN
surface_finish32.0 MICROINCHES BOTTOM
outside_diameter1.250 INCHES NOMINAL IN
special_featuresPRIME CONCAVE SURFACE ONLY; USE EC3917
style_designatorCONCAVE
material_thickness0.200 INCHES NOMINAL IN
NSN5310-01-286-2559
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6515-50-012-5101 · 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: 32.0 MICROINCHES BOTTOM
•
RADIUS: 3.820 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CONCAVE
•
OUTSIDE DIAMETER: 1.250 INCHES NOMINAL IN
•
RECESS DEPTH: 0.010 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.200 INCHES NOMINAL IN
•
MATERIAL: TITANIUM ALLOY OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH32.0 MICROINCHES BOTTOM
RADIUS3.820 INCHES NOMINAL IN
STYLE DESIGNATORCONCAVE
OUTSIDE DIAMETER1.250 INCHES NOMINAL IN
RECESS DEPTH0.010 INCHES NOMINAL IN
MATERIAL THICKNESS0.200 INCHES NOMINAL IN
SPECIAL FEATURESPRIME CONCAVE SURFACE ONLY; USE EC3917
MATERIALTITANIUM ALLOY OVERALL
HOLE DIAMETER0.688 INCHES NOMINAL 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 6515-50-012-5101?
6515-50-012-5101 is a WASHER,CONCAVE.
What is the NSN for 6515-50-012-5101?
6515-50-012-5101 is cataloged in the U.S. Government catalog under NSN 5310-01-286-2559. 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.