NSN 1720-01-271-8757 · NIIN 012718757 · Part number 504821-8
The Entwistle Company Llc · FSC 1720 — Aircraft Launching Equipment · FSG 17 — Aircraft Launch, Landing, and Ground Handling Equipment · CAGE 20722
Government record, cited
NSN 1720-01-271-8757 — this item is cataloged by the U.S. Government under National Stock Number 1720-01-271-8757. Manufacturer of record part number: 504821-8.
FSG: 17 — Aircraft Launch, Landing, and Ground Handling Equipment
Primary part number: 504821-8
Manufacturer: The Entwistle Company Llc
General Description
The Strap Assembly, cataloged under National Stock Number 1720-01-271-8757, is classified within Federal Supply Class 1720 (Aircraft Launching Equipment) of the Aircraft Launch, Landing, and Ground Handling Equipment group. The manufacturer of record is The Entwistle Company Llc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Other items in FSC 1720 — Aircraft Launching Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1720-00-001-4571
CAM,CUTOFF
1720-00-001-4572
CAM,VALVE
1720-00-001-4573
CROSSOVER BLOCK
1720-00-003-0437
1720-00-003-0437 · Item name not on file
1720-00-003-0438
1720-00-003-0438 · Item name not on file
1720-00-003-0439
1720-00-003-0439 · Item name not on file
1720-00-003-1503
NEEDLE-CUSHION
1720-00-003-6410
1720-00-003-6410 · Item name not on file
Frequently Asked Questions
What is NSN 1720-01-271-8757?
NSN 1720-01-271-8757 is a Strap Assembly, manufactured by The Entwistle Company Llc, classified under FSC 1720, Aircraft Launching Equipment. Status: active.
What part numbers are listed for NSN 1720-01-271-8757?
NSN 1720-01-271-8757 has 1 manufacturer part number on file: 504821-8 (The Entwistle Company Llc).
What are the specifications of 504821-8?
Key specifications for 504821-8: End Item Identification: ARRESTING GEAR BARRIER M-21. 0 specifications are documented in the U.S. Government catalog.
Is NSN 1720-01-271-8757 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.
What is the DEMIL code for NSN 1720-01-271-8757?
NSN 1720-01-271-8757 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.