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W1-221SN — WASHER,SHOULDERED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

W1-221SN: WASHER,SHOULDERED.

The WASHER,SHOULDERED is a the manufacturer industrial component. Key specifications include hole_diameter: 0.085 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN, overall_height: 0.067 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN, shoulder_height: 0.025 INCHES NOMINAL IN, outside_diameter: 0.308 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN, style_designator: SHOULDERED, shoulder_diameter: 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-397-6511, 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
W1-221SN
NSN: 5310-01-397-6511
FSC: 5310 — Nuts and Washers
CAGE: 04729 — UNICORP. (USA)
SPECIFICATIONS
hole_diameter0.085 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
overall_height0.067 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN
shoulder_height0.025 INCHES NOMINAL IN
outside_diameter0.308 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN
style_designatorSHOULDERED
shoulder_diameter0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
NSN5310-01-397-6511
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: W1-221SN · 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
•
SHOULDER HEIGHT: 0.025 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SHOULDERED
•
OUTSIDE DIAMETER: 0.308 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN
•
SHOULDER DIAMETER: 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.085 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.067 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN
SHOULDER HEIGHT0.025 INCHES NOMINAL IN
STYLE DESIGNATORSHOULDERED
OUTSIDE DIAMETER0.308 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN
SHOULDER DIAMETER0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN
HOLE DIAMETER0.085 INCHES MINIMUM AND 0.095 INCHES MAXIMUM 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 W1-221SN?
W1-221SN is a WASHER,SHOULDERED.
What is the NSN for W1-221SN?
W1-221SN is cataloged in the U.S. Government catalog under NSN 5310-01-397-6511. 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.