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6539-11-136-8101 — WASHER,RECESSED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

6539-11-136-8101: WASHER,RECESSED.

The WASHER,RECESSED is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, hole_diameter: 6.137 INCHES NOMINAL IN, overall_height: 0.310 INCHES NOMINAL IN, outside_diameter: 6.556 INCHES MINIMUM AND 6.558 INCHES MAXIMUM IN, style_designator: RECESSED, material_thickness: 0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-448-5943, 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
6539-11-136-8101
NSN: 5310-01-448-5943
FSC: 5310 — Nuts and Washers
CAGE: 78286 — SIKORSKY AIRCRAFT CORPORATION DBA SIKORSKY AIRCRAFT CORP (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
hole_diameter6.137 INCHES NOMINAL IN
overall_height0.310 INCHES NOMINAL IN
outside_diameter6.556 INCHES MINIMUM AND 6.558 INCHES MAXIMUM IN
style_designatorRECESSED
material_thickness0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN
NSN5310-01-448-5943
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6539-11-136-8101 · 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: RECESSED
•
OUTSIDE DIAMETER: 6.556 INCHES MINIMUM AND 6.558 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY OVERALL
•
HOLE DIAMETER: 6.137 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.310 INCHES NOMINAL IN
STYLE DESIGNATORRECESSED
OUTSIDE DIAMETER6.556 INCHES MINIMUM AND 6.558 INCHES MAXIMUM IN
MATERIAL THICKNESS0.089 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY OVERALL
HOLE DIAMETER6.137 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 6539-11-136-8101?
6539-11-136-8101 is a WASHER,RECESSED.
What is the NSN for 6539-11-136-8101?
6539-11-136-8101 is cataloged in the U.S. Government catalog under NSN 5310-01-448-5943. 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.