NSN 5310-01-210-4978 · NIIN 012104978 · Part number 55198-01
Atk Launch Systems Llc Dba Atk Launch Systems-Promontory Div Propulsion Systems - Promontory · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 07703
Government record, cited
NSN 5310-01-210-4978 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-210-4978. Manufacturer of record part number: 55198-01.
Also searched as5310-01-210-4978 ·
5310012104978 ·
NIIN 012104978 ·
01-210-4978 ·
FSC 5310 Nuts and Washers · CAGE 07703 · 55198-01
Manufacturer of record: Atk Launch Systems Llc Dba Atk Launch Systems-Promontory Div Propulsion Systems - Promontory
Identification
NSN: 5310-01-210-4978
NIIN: 012104978
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 55198-01
Manufacturer: Atk Launch Systems Llc Dba Atk Launch Systems-Promontory Div Propulsion Systems - Promontory
General Description
The Washer,recessed, cataloged under National Stock Number 5310-01-210-4978, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Atk Launch Systems Llc Dba Atk Launch Systems-Promontory Div Propulsion Systems - Promontory. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Catalog Facts
Item Name
Washer,recessed
FSC / FSG
5310 — Nuts and Washers (FSG 53)
Manufacturers
Atk Launch Systems Llc Dba Atk Launch Systems-Promontory Div Propulsion Systems - Promontory (CAGE 07703)
Technical Specifications
Parameter
Value
NSN
5310-01-210-4978
Primary Part Number
55198-01
Item Name
Washer,recessed
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Atk Launch Systems Llc Dba Atk Launch Systems-Promontory Div Propulsion Systems - Promontory
Atk Launch Systems Llc Dba Atk Launch Systems-Promontory Div Propulsion Systems - Promontory (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 5310-01-210-4978?
NSN 5310-01-210-4978 is a Washer,recessed, manufactured by Atk Launch Systems Llc Dba Atk Launch Systems-Promontory Div Propulsion Systems - Promontory, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-210-4978?
NSN 5310-01-210-4978 has 1 manufacturer part number on file: 55198-01 (Atk Launch Systems Llc Dba Atk Launch Systems-Promontory Div Propulsion Systems - Promontory).
Is NSN 5310-01-210-4978 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.