Valve, Poppet, Engine2815-01-254-1523

NSN 2815-01-254-1523 · NIIN 012541523 · Part number SX3173

Trw Inc Trw Intl Trade Government Sales Dept · FSC 2815 — Diesel Engines and Components · FSG 28 — Engines, Turbines, and Components · CAGE 31033

Government record, cited

NSN 2815-01-254-1523 — this item is cataloged by the U.S. Government under National Stock Number 2815-01-254-1523. Manufacturer of record part number: SX3173.

Also searched as 2815-01-254-1523 · 2815012541523 · NIIN 012541523 · 01-254-1523 · FSC 2815 Diesel Engines and Components · CAGE 31033 · SX3173

Nearby stock numbers ← 2815-01-254-1114 Rocker Arm, Engine Poppet Valve · 2815-01-254-1559 Manifold, Intake →

Features

Valve,poppet,engine — FSC 2815
Stem Diameter: 0.4960 INCHES NOMINAL IN
Stem Length: 6.8550 INCHES NOMINAL IN
Seat Angle in Deg: 60.0
Outside Diameter: 1.8900 INCHES NOMINAL IN
Stem Style: GROOVED
Head Style: FLAT
Unable to Decode: UNABLE TO DECODE

Identification

NSN: 2815-01-254-1523
NIIN: 012541523
FSC: 2815 — Diesel Engines and Components
FSG: 28 — Engines, Turbines, and Components
Primary part number: SX3173
Manufacturer: Trw Inc Trw Intl Trade Government Sales Dept

General Description

The Valve,poppet,engine, cataloged under National Stock Number 2815-01-254-1523, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Trw Inc Trw Intl Trade Government Sales Dept. Government technical data includes 7 specifications, 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.

Technical Specifications

Parameter	Value
NSN	2815-01-254-1523
Primary Part Number	SX3173
Item Name	Valve,poppet,engine
FSC / FSG	2815 / 28 — Diesel Engines and Components
Manufacturer	Trw Inc Trw Intl Trade Government Sales Dept
Status	ACTIVE
Stem Diameter	0.4960 INCHES NOMINAL IN
Stem Length	6.8550 INCHES NOMINAL IN
Seat Angle in Deg	60.0
Outside Diameter	1.8900 INCHES NOMINAL IN
Stem Style	GROOVED
Head Style	FLAT
Unable to Decode	UNABLE TO DECODE

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
SX3173 PRIMARY	Trw Inc Trw Intl Trade Government Sales Dept (USA)

No interchangeability data on file.

Other items in FSC 2815 — Diesel Engines and Components

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

2815-00-000-0075

ENGINE,DIESEL

2815-00-001-0022

VALVE,POPPET,ENGINE

2815-00-001-3475

PISTON,INTERNAL COMBUSTION ENGIN

2815-00-001-7728

TAPPET,PUMP

2815-00-001-7737

2815-00-001-7737 · Item name not on file

2815-00-001-7805

OIL PUMP ASSEMBLY

2815-00-001-7806

CAMSHAFT,ENGINE

2815-00-001-7813

RING SET,PISTON

Frequently Asked Questions

What is NSN 2815-01-254-1523?

NSN 2815-01-254-1523 is a Valve,poppet,engine, manufactured by Trw Inc Trw Intl Trade Government Sales Dept, classified under FSC 2815, Diesel Engines and Components. Status: active.

What part numbers are listed for NSN 2815-01-254-1523?

NSN 2815-01-254-1523 has 1 manufacturer part number on file: SX3173 (Trw Inc Trw Intl Trade Government Sales Dept).

What are the specifications of SX3173?

Key specifications for SX3173: Stem Diameter: 0.4960 INCHES NOMINAL IN; Stem Length: 6.8550 INCHES NOMINAL IN; Seat Angle in Deg: 60.0; Outside Diameter: 1.8900 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.

Is NSN 2815-01-254-1523 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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