Housing, Bypass Valve Spring2840-00-980-0288

NSN 2840-00-980-0288 · NIIN 009800288

FSC 2840 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components · FSG 28 — Engines, Turbines, and Components

Government record, cited

Also searched as 2840-00-980-0288 · 2840009800288 · NIIN 009800288 · 00-980-0288 · FSC 2840 Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components

Nearby stock numbers ← 2840-00-980-0254 Cover, Fuel Filter D · 2840-00-980-0289 Support, Breather Tu →

Features

Housing,bypass Valve Spring — FSC 2840
General Characteristics Item Description: CRES AMS5637,ROCKWELL C SCALE 26 MIN,34 MAX HARDNESS,1.200 IN. NOMO/A LG,0.6763 IN. MIN,0.6875 IN. MAX LARGEST OD,0.440 IN. MIN,0.445 IN.MAX OD 1ST END 1ST STEP,0.320 IN. NOM LG 1ST END 1ST STEP,0.559 IN. MIN,0.560 IN. MAX OD 1ST END 2ND STEP,0.040 IN. NOM LG 1ST END 2ND STEP,0.459IN. MIN,0.461 IN. MAX OD 1ST END 3RD STEP,0.100 IN. NOM LG 1ST END 3RDSTEP,0.459 IN. MIN,0.461 IN. MAX OD 1ST END 4TH STEP,0.210 IN. NOM LG 1STEND 4TH STEP,PARTIAL BORE 1ST END,0.330 IN. MIN,0.337 IN. MAX DIA,0.890IN. NOM DEPTH,HEX DRIVE 2ND END,0.310 IN. NOM WIDTH ACROSS FLATS,0.220IN. NOM H,0.046 IN. NOM DIA HOLE THROUGH DRIVE IN

Identification

NSN: 2840-00-980-0288
NIIN: 009800288
FSC: 2840 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components
FSG: 28 — Engines, Turbines, and Components

General Description

The Housing,bypass Valve Spring, cataloged under National Stock Number 2840-00-980-0288, is classified within Federal Supply Class 2840 (Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components) of the Engines, Turbines, and Components group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	2840-00-980-0288
Item Name	Housing,bypass Valve Spring
FSC / FSG	2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components
Status	ACTIVE
General Characteristics Item Description	CRES AMS5637,ROCKWELL C SCALE 26 MIN,34 MAX HARDNESS,1.200 IN. NOMO/A LG,0.6763 IN. MIN,0.6875 IN. MAX LARGEST OD,0.440 IN. MIN,0.445 IN.MAX OD 1ST END 1ST STEP,0.320 IN. NOM LG 1ST END 1ST STEP,0.559 IN. MIN,0.560 IN. MAX OD 1ST END 2ND STEP,0.040 IN. NOM LG 1ST END 2ND STEP,0.459IN. MIN,0.461 IN. MAX OD 1ST END 3RD STEP,0.100 IN. NOM LG 1ST END 3RDSTEP,0.459 IN. MIN,0.461 IN. MAX OD 1ST END 4TH STEP,0.210 IN. NOM LG 1STEND 4TH STEP,PARTIAL BORE 1ST END,0.330 IN. MIN,0.337 IN. MAX DIA,0.890IN. NOM DEPTH,HEX DRIVE 2ND END,0.310 IN. NOM WIDTH ACROSS FLATS,0.220IN. NOM H,0.046 IN. NOM DIA HOLE THROUGH DRIVE IN

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

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
2-060-189-01	3/2 Design control — primary reference U.S. Government activity

No interchangeability data on file.

Other items in FSC 2840 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components

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

2840-00-000-0048

ENGINE,AIRCRAFT,TURBO-SHAFT

2840-00-000-0049

MODIFICATION KIT,ENGINE

2840-00-001-1741

CASE AND NOZZLE ASSEMBLY,TURBINE

2840-00-001-1743

2840-00-001-1743 · Item name not on file

2840-00-001-2117

2840-00-001-2117 · Item name not on file

2840-00-001-2284

2840-00-001-2284 · Item name not on file

2840-00-001-3922

2840-00-001-3922 · Item name not on file

2840-00-001-4903

SEAL,AIR,AIRCRAFT GAS TURBINE EN

Frequently Asked Questions

What is NSN 2840-00-980-0288?

NSN 2840-00-980-0288 is a Housing,bypass Valve Spring, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.

What are the specifications of 2840-00-980-0288?

Key specifications for 2840-00-980-0288: General Characteristics Item Description: CRES AMS5637,ROCKWELL C SCALE 26 MIN,34 MAX HARDNESS,1.200 IN. NOMO/A LG,0.6763 IN. MIN,0.6875 IN. MAX LARGEST OD,0.440 IN. MIN,0.445 IN.MAX OD 1ST END 1ST STEP,0.320 IN. NOM LG 1ST END 1ST STEP,0.559 IN. MIN,0.560 IN. MAX OD 1ST END 2ND STEP,0.040 IN. NOM LG 1ST END 2ND STEP,0.459IN. MIN,0.461 IN. MAX OD 1ST END 3RD STEP,0.100 IN. NOM LG 1ST END 3RDSTEP,0.459 IN. MIN,0.461 IN. MAX OD 1ST END 4TH STEP,0.210 IN. NOM LG 1STEND 4TH STEP,PARTIAL BORE 1ST END,0.330 IN. MIN,0.337 IN. MAX DIA,0.890IN. NOM DEPTH,HEX DRIVE 2ND END,0.310 IN. NOM WIDTH ACROSS FLATS,0.220IN. NOM H,0.046 IN. NOM DIA HOLE THROUGH DRIVE IN. 1 specification is documented in the U.S. Government catalog.

Is NSN 2840-00-980-0288 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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