Plate, Retaining, Diaphragm2990-00-754-7988

NSN 2990-00-754-7988 · NIIN 007547988

FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft · FSG 29 — Engine Accessories

Government record, cited

Also searched as 2990-00-754-7988 · 2990007547988 · NIIN 007547988 · 00-754-7988 · FSC 2990 Miscellaneous Engine Accessories, Nonaircraft · 662584 · 662584

Nearby stock numbers ← 2990-00-754-7987 Housing, Valve · 2990-00-754-8017 →

Features

Plate,retaining,diaphragm — FSC 2990
General Characteristics Item Description: ALUMINUM ALLOY; ANODIZED FINISH; 2.200 IN. OD; 0.302 IN. THK; 4 MTG HOLES AND 1 ALINEMENT HOLE 0.160 IN. DIA; CENTER HOLE 1.068 IN. DIA COUNTERBORE 1.250 IN. 0.240 IN. DEEP; MTG HOLES ON 1.750 IN. BOLT CIRCLE IN

Identification

NSN: 2990-00-754-7988
NIIN: 007547988
FSC: 2990 — Miscellaneous Engine Accessories, Nonaircraft
FSG: 29 — Engine Accessories

General Description

The Plate,retaining,diaphragm, cataloged under National Stock Number 2990-00-754-7988, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	2990-00-754-7988
Item Name	Plate,retaining,diaphragm
FSC / FSG	2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft
Status	ACTIVE
General Characteristics Item Description	ALUMINUM ALLOY; ANODIZED FINISH; 2.200 IN. OD; 0.302 IN. THK; 4 MTG HOLES AND 1 ALINEMENT HOLE 0.160 IN. DIA; CENTER HOLE 1.068 IN. DIA COUNTERBORE 1.250 IN. 0.240 IN. DEEP; MTG HOLES ON 1.750 IN. BOLT CIRCLE 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
662584	5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co
662584	3/2 Design control — primary reference U.S. Government activity

No interchangeability data on file.

Other items in FSC 2990 — Miscellaneous Engine Accessories, Nonaircraft

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

2990-00-001-0001

BLOWER ASSEMBLY

2990-00-001-1248

2990-00-001-1248 · Item name not on file

2990-00-001-1250

2990-00-001-1250 · Item name not on file

2990-00-001-2055

2990-00-001-2055 · Item name not on file

2990-00-001-3498

2990-00-001-3498 · Item name not on file

2990-00-001-3520

2990-00-001-3520 · Item name not on file

2990-00-001-3521

2990-00-001-3521 · Item name not on file

2990-00-001-3522

CAP ASSEMBLY,MUFFLE

Frequently Asked Questions

What is NSN 2990-00-754-7988?

NSN 2990-00-754-7988 is a Plate,retaining,diaphragm, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.

What are the specifications of 2990-00-754-7988?

Key specifications for 2990-00-754-7988: General Characteristics Item Description: ALUMINUM ALLOY; ANODIZED FINISH; 2.200 IN. OD; 0.302 IN. THK; 4 MTG HOLES AND 1 ALINEMENT HOLE 0.160 IN. DIA; CENTER HOLE 1.068 IN. DIA COUNTERBORE 1.250 IN. 0.240 IN. DEEP; MTG HOLES ON 1.750 IN. BOLT CIRCLE IN. 1 specification is documented in the U.S. Government catalog.

Is NSN 2990-00-754-7988 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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