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409B206-1 — WASHER,SPRING TENSION

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

409B206-1: WASHER,SPRING TENSION.

The WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.642 INCHES NOMINAL IN, overall_height: 0.097 INCHES NOMINAL IN, hardness_rating: 49.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM, outside_diameter: 1.200 INCHES NOMINAL IN, style_designator: SPRING TENSION. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-177-9941, 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
409B206-1
NSN: 5310-01-177-9941
FSC: 5310 — Nuts and Washers
CAGE: 17472 — EATON AEROSPACE LLC DBA EATON INOAC DIV FUEL & MOTION CONTROL SYSTEMS DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.642 INCHES NOMINAL IN
overall_height0.097 INCHES NOMINAL IN
hardness_rating49.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
outside_diameter1.200 INCHES NOMINAL IN
style_designatorSPRING TENSION
surface_treatmentOIL OVERALL
material_thickness0.069 INCHES NOMINAL IN
NSN5310-01-177-9941
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 409B206-1 · 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
•
HARDNESS RATING: 49.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: SPRING TENSION
•
OUTSIDE DIAMETER: 1.200 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.069 INCHES NOMINAL IN
•
SURFACE TREATMENT: OIL OVERALL
•
MATERIAL: STEEL OVERALL
•
HOLE DIAMETER: 0.642 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.097 INCHES NOMINAL IN
HARDNESS RATING49.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORSPRING TENSION
OUTSIDE DIAMETER1.200 INCHES NOMINAL IN
MATERIAL THICKNESS0.069 INCHES NOMINAL IN
SURFACE TREATMENTOIL OVERALL
MATERIALSTEEL OVERALL
HOLE DIAMETER0.642 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 1
10110049Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 409B206-1?
409B206-1 is a WASHER,SPRING TENSION.
What parts can replace 409B206-1?
There is 1 known substitute for 409B206-1: 10110049. Substitute compatibility should be verified for your specific system.
What is the NSN for 409B206-1?
409B206-1 is cataloged in the U.S. Government catalog under NSN 5310-01-177-9941. 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.