NSN 5310-01-397-6511 · NIIN 013976511 · Part number W1-221SN
Unicorp. · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 04729
Government record, cited
NSN 5310-01-397-6511 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-397-6511. Manufacturer of record part number: W1-221SN.
Also searched as5310-01-397-6511 ·
5310013976511 ·
NIIN 013976511 ·
01-397-6511 ·
FSC 5310 Nuts and Washers · CAGE 04729 · W1-221SN
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
1 manufacturer part number on file
Manufacturer of record: Unicorp.
Identification
NSN: 5310-01-397-6511
NIIN: 013976511
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: W1-221SN
Manufacturer: Unicorp.
General Description
The Washer,shouldered, cataloged under National Stock Number 5310-01-397-6511, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Unicorp.. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
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5310-00-000-4532 · Item name not on file
5310-00-000-4540
5310-00-000-4540 · Item name not on file
Frequently Asked Questions
What is NSN 5310-01-397-6511?
NSN 5310-01-397-6511 is a Washer,shouldered, manufactured by Unicorp., classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-397-6511?
NSN 5310-01-397-6511 has 1 manufacturer part number on file: W1-221SN (Unicorp.).
What are the specifications of W1-221SN?
Key specifications for W1-221SN: Overall Height: 0.067 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN; Shoulder Height: 0.025 INCHES NOMINAL IN; Style Designator: SHOULDERED; Outside Diameter: 0.308 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN. 5 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-397-6511 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.