PartsTable TECHNICAL DATA SHEET

NSN 4310-01-266-9494Government record, cited

Ring, Piston4310-01-266-9494

NSN 4310-01-266-9494 · NIIN 012669494 · Part number 721A7MT972-4780

Greene Tweed & Co Inc · FSC 4310 — Compressors and Vacuum Pumps · FSG 43 — Pumps and Compressors · CAGE 5F573

Government record, cited

NSN 4310-01-266-9494 — this item is cataloged by the U.S. Government under National Stock Number 4310-01-266-9494. Manufacturer of record part number: 721A7MT972-4780.

Also searched as 4310-01-266-9494 · 4310012669494 · NIIN 012669494 · 01-266-9494 · FSC 4310 Compressors and Vacuum Pumps · CAGE 5F573 · 721A7MT972-4780

Nearby stock numbers ← 4310-01-266-8249 Air Cleaner, Intake · 4310-01-266-9589 Compressor, Rotary →

Features

Ring,piston — FSC 4310
1 manufacturer part number on file
Manufacturer of record: Greene Tweed & Co Inc

Identification

NSN: 4310-01-266-9494
NIIN: 012669494
FSC: 4310 — Compressors and Vacuum Pumps
FSG: 43 — Pumps and Compressors
Primary part number: 721A7MT972-4780
Manufacturer: Greene Tweed & Co Inc

General Description

The Ring,piston, cataloged under National Stock Number 4310-01-266-9494, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Greene Tweed & Co Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.

Catalog Facts

Item Name	Ring,piston
FSC / FSG	4310 — Compressors and Vacuum Pumps (FSG 43)
Manufacturers	Greene Tweed & Co Inc (CAGE 5F573)

Technical Specifications

Parameter	Value
NSN	4310-01-266-9494
Primary Part Number	721A7MT972-4780
Item Name	Ring,piston
FSC / FSG	4310 / 43 — Compressors and Vacuum Pumps
Manufacturer	Greene Tweed & Co Inc
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
721A7MT972-4780 PRIMARY	Greene Tweed & Co Inc (USA)

Reference documents

Reference	Meaning
721A7MT972-4780	5/9 Secondary reference Palmetto Inc

No interchangeability data on file.

Other items in FSC 4310 — Compressors and Vacuum Pumps

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4310-00-000-0050

COMPRESSOR UNIT,RECIPROCATING

4310-00-001-0059

4310-00-001-0059 · Item name not on file

4310-00-001-2044

MOUNTING PAD,TANK,PRESSURE

4310-00-001-3477

PARTS KIT,VACUUM PUMP

4310-00-001-3493

VACUUM PUMP,ROTARY

4310-00-001-6194

4310-00-001-6194 · Item name not on file

4310-00-001-6381

4310-00-001-6381 · Item name not on file

4310-00-001-7755

PARTS KIT,VACUUM PUMP

Frequently Asked Questions

What is NSN 4310-01-266-9494?

NSN 4310-01-266-9494 is a Ring,piston, manufactured by Greene Tweed & Co Inc, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.

What part numbers are listed for NSN 4310-01-266-9494?

NSN 4310-01-266-9494 has 1 manufacturer part number on file: 721A7MT972-4780 (Greene Tweed & Co Inc).

Is NSN 4310-01-266-9494 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.

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