Ring, Wearing2935-01-657-1221

NSN 2935-01-657-1221 · NIIN 016571221 · Part number 27RD1232305A057

Greene Tweed & Co Inc · FSC 2935 — Engine System Cooling Components, Aircraft Prime Moving · FSG 29 — Engine Accessories · CAGE 5F573

Government record, cited

NSN 2935-01-657-1221 — this item is cataloged by the U.S. Government under National Stock Number 2935-01-657-1221. Manufacturer of record part number: 27RD1232305A057.

Also searched as 2935-01-657-1221 · 2935016571221 · NIIN 016571221 · 01-657-1221 · FSC 2935 Engine System Cooling Components, Aircraft Prime Moving · CAGE 5F573 · 27RD1232305A057 · JS20365

Nearby stock numbers ← 2935-01-657-0814 Ring, Wearing · 2935-01-659-0643 Cap, Filler Opening →

Features

Ring,wearing — FSC 2935
2 manufacturer part numbers on file
Manufacturer of record: Greene Tweed & Co Inc

Identification

NSN: 2935-01-657-1221
NIIN: 016571221
FSC: 2935 — Engine System Cooling Components, Aircraft Prime Moving
FSG: 29 — Engine Accessories
Primary part number: 27RD1232305A057
Manufacturer: Greene Tweed & Co Inc

General Description

The Ring,wearing, cataloged under National Stock Number 2935-01-657-1221, is classified within Federal Supply Class 2935 (Engine System Cooling Components, Aircraft Prime Moving) of the Engine Accessories group. The manufacturer of record is Greene Tweed & Co Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Catalog Facts

Item Name	Ring,wearing
FSC / FSG	2935 — Engine System Cooling Components, Aircraft Prime Moving (FSG 29)
Manufacturers	Greene Tweed & Co Inc (CAGE 5F573); Rolls-Royce Corporation (CAGE 63005)

Technical Specifications

Parameter	Value
NSN	2935-01-657-1221
Primary Part Number	27RD1232305A057
Item Name	Ring,wearing
FSC / FSG	2935 / 29 — Engine System Cooling Components, Aircraft Prime Moving
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
27RD1232305A057 PRIMARY	Greene Tweed & Co Inc (USA)
JS20365	Rolls-Royce Corporation (USA)

No interchangeability data on file.

Other items in FSC 2935 — Engine System Cooling Components, Aircraft Prime Moving

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

2935-00-361-6502

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2935-00-420-9902

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2935-00-442-5837

2935-00-442-5837 · Item name not on file

2935-00-442-5839

2935-00-442-5839 · Item name not on file

2935-00-757-7092

2935-00-757-7092 · Item name not on file

2935-00-861-0023

2935-00-861-0023 · Item name not on file

2935-00-874-8420

VALVE,OIL COOLER

2935-00-932-2487

COOLER,LUBRICATING OIL,ENGINE

Frequently Asked Questions

What is NSN 2935-01-657-1221?

NSN 2935-01-657-1221 is a Ring,wearing, manufactured by Greene Tweed & Co Inc, classified under FSC 2935, Engine System Cooling Components, Aircraft Prime Moving. Status: active.

What part numbers are listed for NSN 2935-01-657-1221?

NSN 2935-01-657-1221 has 2 manufacturer part numbers on file: 27RD1232305A057 (Greene Tweed & Co Inc), JS20365 (Rolls-Royce Corporation).

Is NSN 2935-01-657-1221 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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