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6512-21-133-5101 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6512-21-133-5101: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 301 OR STEEL COMP 302 OVERALL, hole_diameter: 5.125 INCHES MINIMUM AND 5.135 INCHES MAXIMUM IN, outside_diameter: 5.850 INCHES NOMINAL IN, special_features: FIRST,NINTH,TWELFTH KEY PREBENT, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.063 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-124-1260, 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
6512-21-133-5101
NSN: 5310-01-124-1260
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 301 OR STEEL COMP 302 OVERALL
hole_diameter5.125 INCHES MINIMUM AND 5.135 INCHES MAXIMUM IN
outside_diameter5.850 INCHES NOMINAL IN
special_featuresFIRST,NINTH,TWELFTH KEY PREBENT
surface_treatmentPASSIVATE OVERALL
material_thickness0.063 INCHES NOMINAL IN
external_key_quantity19
external_prebent_key_length0.115 INCHES NOMINAL IN
overall_distance_including_keys6.275 INCHES NOMINAL IN
small_external_prebent_key_width0.440 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-5059,COND A MIL SPEC ALL MATERIAL RESPONSES OVERALL
distance_from_centerline_to_inside_of_prebent_key2.940 INCHES NOMINAL IN
NSN5310-01-124-1260
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6512-21-133-5101 · 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
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 2.940 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY LENGTH: 0.115 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 6.275 INCHES NOMINAL IN
•
SMALL EXTERNAL PREBENT KEY WIDTH: 0.440 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059,COND A MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE DIAMETER: 5.850 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.063 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 19
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY2.940 INCHES NOMINAL IN
EXTERNAL PREBENT KEY LENGTH0.115 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS6.275 INCHES NOMINAL IN
SMALL EXTERNAL PREBENT KEY WIDTH0.440 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059,COND A MIL SPEC ALL MATERIAL RESPONSES OVERALL
OUTSIDE DIAMETER5.850 INCHES NOMINAL IN
MATERIAL THICKNESS0.063 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY19
SPECIAL FEATURESFIRST,NINTH,TWELFTH KEY PREBENT
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6512-21-133-5101?
6512-21-133-5101 is a WASHER,KEY.
What is the NSN for 6512-21-133-5101?
6512-21-133-5101 is cataloged in the U.S. Government catalog under NSN 5310-01-124-1260. 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.