NSN 5310-00-044-1645 · NIIN 000441645 · Part number 543144
Ontic Engineering & Manufacturing, Inc Dba Ontic Us · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 45934
Government record, cited
NSN 5310-00-044-1645 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-044-1645. Manufacturer of record part number: 543144.
Also searched as5310-00-044-1645 ·
5310000441645 ·
NIIN 000441645 ·
00-044-1645 ·
FSC 5310 Nuts and Washers · CAGE 45934 · 543144
Manufacturer: Ontic Engineering & Manufacturing, Inc Dba Ontic Us
General Description
The Washer,flat, cataloged under National Stock Number 5310-00-044-1645, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5310-00-044-1645
Primary Part Number
543144
Item Name
Washer,flat
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Ontic Engineering & Manufacturing, Inc Dba Ontic Us
Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA)
No interchangeability data on file.
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
5310-00-000-0040 · 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 5310-00-044-1645?
NSN 5310-00-044-1645 is a Washer,flat, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-00-044-1645?
NSN 5310-00-044-1645 has 2 manufacturer part numbers on file: 543144 (Hamilton Sundstrand Corporation Dba Collins Aerospace), 543144 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
What are the specifications of 543144?
Key specifications for 543144: Overall Diameter: 1.120 INCHES NOMINAL IN; Heat Treatment: AS FABRICATED; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 8 specifications are documented in the U.S. Government catalog.
Is NSN 5310-00-044-1645 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.