NSN 4720-01-321-1128 · NIIN 013211128 · Part number 166837-4
Rtx Corporation Div Pratt & Whitney · FSC 4720 — Hose and Flexible Tubing · FSG 47 — Pipe, Tubing, Hose, and Fittings · CAGE 55820
Government record, cited
NSN 4720-01-321-1128 — this item is cataloged by the U.S. Government under National Stock Number 4720-01-321-1128. Manufacturer of record part number: 166837-4.
Also searched as4720-01-321-1128 ·
4720013211128 ·
NIIN 013211128 ·
01-321-1128 ·
FSC 4720 Hose and Flexible Tubing · CAGE 55820 · 166837-4
Specification/standard Data: 55820-166837 MANUFACTURERS STANDARD
1 manufacturer part number on file
Manufacturer of record: Rtx Corporation Div Pratt & Whitney
Identification
NSN: 4720-01-321-1128
NIIN: 013211128
FSC: 4720 — Hose and Flexible Tubing
FSG: 47 — Pipe, Tubing, Hose, and Fittings
Primary part number: 166837-4
Manufacturer: Rtx Corporation Div Pratt & Whitney
General Description
The Tubing,nonmetallic, cataloged under National Stock Number 4720-01-321-1128, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 1 specification, 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.
Other items in FSC 4720 — Hose and Flexible Tubing
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4720-00-000-0080
HOSE ASSEMBLY,NONMETALLIC
4720-00-000-0081
4720-00-000-0081 · Item name not on file
4720-00-000-0084
HOSE,PREFORMED
4720-00-000-0724
4720-00-000-0724 · Item name not on file
4720-00-001-0014
HOSE ASSEMBLY,NONMETALLIC
4720-00-001-0015
4720-00-001-0015 · Item name not on file
4720-00-001-0023
HOSE ASSEMBLY,NONMETALLIC
4720-00-001-0025
4720-00-001-0025 · Item name not on file
Frequently Asked Questions
What is NSN 4720-01-321-1128?
NSN 4720-01-321-1128 is a Tubing,nonmetallic, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
What part numbers are listed for NSN 4720-01-321-1128?
NSN 4720-01-321-1128 has 1 manufacturer part number on file: 166837-4 (Rtx Corporation Div Pratt & Whitney).
What are the specifications of 166837-4?
Key specifications for 166837-4: Specification/standard Data: 55820-166837 MANUFACTURERS STANDARD. 1 specification is documented in the U.S. Government catalog.
Is NSN 4720-01-321-1128 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.