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6539-11-138-4101 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6539-11-138-4101: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: ROUND, nut_diameter: 3.915 INCHES NOMINAL IN, thread_class: 3B, nut_thickness: 0.600 INCHES NOMINAL IN, thread_series: UNJS. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-447-5026, 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
6539-11-138-4101
NSN: 5310-01-447-5026
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleROUND
nut_diameter3.915 INCHES NOMINAL IN
thread_class3B
nut_thickness0.600 INCHES NOMINAL IN
thread_seriesUNJS
hardness_rating28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
special_features8 COUNTERSUNK HOLES LOCATED ON A OD OF 3.915
thread_directionRIGHT-HAND
drive_point_depth0.250 INCHES NOMINAL IN
drive_point_width0.250 INCHES NOMINAL IN
nominal_thread_size3.340 INCHES IN
NSN5310-01-447-5026
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6539-11-138-4101 · 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
•
THREAD SERIES: UNJS
•
HARDNESS RATING: 28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
DRIVE POINT WIDTH: 0.250 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 3.340 INCHES IN
•
NUT DIAMETER: 3.915 INCHES NOMINAL IN
•
DRIVE POINT DEPTH: 0.250 INCHES NOMINAL IN
•
NUT THICKNESS: 0.600 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNJS
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
DRIVE POINT WIDTH0.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE3.340 INCHES IN
NUT DIAMETER3.915 INCHES NOMINAL IN
DRIVE POINT DEPTH0.250 INCHES NOMINAL IN
NUT THICKNESS0.600 INCHES NOMINAL IN
SPECIAL FEATURES8 COUNTERSUNK HOLES LOCATED ON A OD OF 3.915
DRIVE POINT QUANTITY8
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 6539-11-138-4101?
6539-11-138-4101 is a NUT,PLAIN,ROUND.
What is the NSN for 6539-11-138-4101?
6539-11-138-4101 is cataloged in the U.S. Government catalog under NSN 5310-01-447-5026. This indicates validated use in U.S. government and defense supply chains.
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