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6435-11-121-7102 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6435-11-121-7102: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, hole_diameter: 3.250 INCHES NOMINAL IN, surface_finish: 90.0 MICROINCHES ALL SURFACES, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM, outside_diameter: 4.250 INCHES NOMINAL IN, special_features: DRILL 4 HOLES 0.265 DIA EQUALLY SPACED ON 3.750 IN. DIA BOLT CIRCLE IN.

This part is cataloged in the U.S. Government catalog under NSN 5310-01-124-1261, 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
6435-11-121-7102
NSN: 5310-01-124-1261
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
hole_diameter3.250 INCHES NOMINAL IN
surface_finish90.0 MICROINCHES ALL SURFACES
hardness_rating26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
outside_diameter4.250 INCHES NOMINAL IN
special_featuresDRILL 4 HOLES 0.265 DIA EQUALLY SPACED ON 3.750 IN. DIA BOLT CIRCLE IN
style_designatorKEY
surface_treatmentOXIDE FILM OVERALL
material_thickness0.090 INCHES NOMINAL IN
internal_key_quantity2
minimum_tensile_strength125000 POUNDS PER SQUARE INCH LBS
internal_straight_key_width0.240 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN
NSN5310-01-124-1261
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6435-11-121-7102 · 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: 90.0 MICROINCHES ALL SURFACES
•
INTERNAL STRAIGHT KEY WIDTH: 0.240 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 1.380 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-13924,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-18729,COND N MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 4.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH90.0 MICROINCHES ALL SURFACES
INTERNAL STRAIGHT KEY WIDTH0.240 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY1.380 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-18729,COND N MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER4.250 INCHES NOMINAL IN
MATERIAL THICKNESS0.090 INCHES NOMINAL IN
SPECIAL FEATURESDRILL 4 HOLES 0.265 DIA EQUALLY SPACED ON 3.750 IN. DIA BOLT CIRCLE 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 6435-11-121-7102?
6435-11-121-7102 is a WASHER,KEY.
What is the NSN for 6435-11-121-7102?
6435-11-121-7102 is cataloged in the U.S. Government catalog under NSN 5310-01-124-1261. This indicates validated use in U.S. government and defense supply chains.
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