NSN 5310-00-166-8781 · NIIN 001668781 · Part number 2W1-11-20-32
The Boeing Company Div Legacy Am&m · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 43999
Government record, cited
NSN 5310-00-166-8781 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-166-8781. Manufacturer of record part number: 2W1-11-20-32.
Also searched as5310-00-166-8781 ·
5310001668781 ·
NIIN 001668781 ·
00-166-8781 ·
FSC 5310 Nuts and Washers · CAGE 43999 · 2W1-11-20-32
Overall Diameter: 0.625 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
Cross-Sectional Shape Style: RECTANGULAR
Specification/standard Data: 43999-2W1 MANUFACTURERS STANDARD
Surface Treatment: CADMIUM OR ZINC OVERALL
Peripheral Shape Style: ROUND
Center Hole Shape Style: ROUND
Hole Diameter: 0.171 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN
Identification
NSN: 5310-00-166-8781
NIIN: 001668781
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 2W1-11-20-32
Manufacturer: The Boeing Company Div Legacy Am&m
General Description
The Washer,flat, cataloged under National Stock Number 5310-00-166-8781, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Legacy Am&m. Government technical data includes 8 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.
5310-00-000-0040
5310-00-000-0040 · Item name not on file
5310-00-000-0077
NUT,PLAIN,ROUND
5310-00-000-0079
WASHER,FLAT
5310-00-000-0079
WASHER,FLAT
5310-00-000-1146
5310-00-000-1146 · Item name not on file
5310-00-000-3815
5310-00-000-3815 · Item name not on file
5310-00-000-4532
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 5310-00-166-8781?
NSN 5310-00-166-8781 is a Washer,flat, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-00-166-8781?
NSN 5310-00-166-8781 has 1 manufacturer part number on file: 2W1-11-20-32 (The Boeing Company Div Legacy Am&m).
What are the specifications of 2W1-11-20-32?
Key specifications for 2W1-11-20-32: Overall Diameter: 0.625 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Specification/standard Data: 43999-2W1 MANUFACTURERS STANDARD; Surface Treatment: CADMIUM OR ZINC OVERALL. 8 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-166-8781 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.