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6390821-14 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6390821-14: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY OVERALL, hole_diameter: 1.254 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN, outside_diameter: 2.036 INCHES NOMINAL IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: ANODIZE OVERALL, material_thickness: 0.312 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-509-6819, 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
6390821-14
NSN: 5310-01-509-6819
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialTITANIUM ALLOY OVERALL
hole_diameter1.254 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
outside_diameter2.036 INCHES NOMINAL IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentANODIZE OVERALL
material_thickness0.312 INCHES NOMINAL IN
material_document_and_classificationMIL-T-4907,CP-2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5310-01-509-6819
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6390821-14 · 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: SPLIT HELICAL-RIGHT HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-T-4907,CP-2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 2.036 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.312 INCHES NOMINAL IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
MATERIAL: TITANIUM ALLOY OVERALL
•
HOLE DIAMETER: 1.254 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-T-4907,CP-2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER2.036 INCHES NOMINAL IN
MATERIAL THICKNESS0.312 INCHES NOMINAL IN
SURFACE TREATMENTANODIZE OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIALTITANIUM ALLOY OVERALL
HOLE DIAMETER1.254 INCHES MINIMUM AND 1.280 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 6390821-14?
6390821-14 is a WASHER,LOCK.
What is the NSN for 6390821-14?
6390821-14 is cataloged in the U.S. Government catalog under NSN 5310-01-509-6819. 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.