PartsTable TECHNICAL DATA SHEET

NSN 4820-01-004-2970Government record, cited

Diaphragm, Actuator Valve, Special4820-01-004-2970

NSN 4820-01-004-2970 · NIIN 010042970 · Part number 202577H

Bellofram Corporation · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 01170

Government record, cited

NSN 4820-01-004-2970 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-004-2970. Manufacturer of record part number: 202577H.

Also searched as 4820-01-004-2970 · 4820010042970 · NIIN 010042970 · 01-004-2970 · FSC 4820 Valves, Nonpowered · CAGE 01170 · 202577H · 4820010042970

Nearby stock numbers ← 4820-01-004-2934 Seat, Valve · 4820-01-004-2987 Disk, Valve →

4820-01-004-2970 — Valves, Nonpowered

Features

Diaphragm,actuator Valve,special — FSC 4820
Style Designator: SPECIAL SHAPED
Material: RUBBER
2 manufacturer part numbers on file
Manufacturer of record: Bellofram Corporation

Identification

NSN: 4820-01-004-2970
NIIN: 010042970
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 202577H
Manufacturer: Bellofram Corporation

General Description

The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-01-004-2970, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bellofram Corporation. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.

Technical Specifications

Parameter	Value
NSN	4820-01-004-2970
Primary Part Number	202577H
Item Name	Diaphragm,actuator Valve,special
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Bellofram Corporation
Status	ACTIVE
Style Designator	SPECIAL SHAPED
Material	RUBBER

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
202577H PRIMARY	Bellofram Corporation (USA)
202577H PRIMARY	Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)

Reference documents

Reference	Meaning
4820010042970	6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales

No interchangeability data on file.

Other items in FSC 4820 — Valves, Nonpowered

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

4820-00-000-0097

4820-00-000-0097 · Item name not on file

4820-00-001-0010

VALVE,ROTARY,SELECTOR

4820-00-001-0020

4820-00-001-0020 · Item name not on file

4820-00-001-0021

4820-00-001-0021 · Item name not on file

4820-00-001-0032

4820-00-001-0032 · Item name not on file

4820-00-001-0037

VALVE,SAFETY RELIEF

4820-00-001-0042

4820-00-001-0042 · Item name not on file

4820-00-001-1230

4820-00-001-1230 · Item name not on file

Frequently Asked Questions

What is NSN 4820-01-004-2970?

NSN 4820-01-004-2970 is a Diaphragm,actuator Valve,special, manufactured by Bellofram Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-004-2970?

NSN 4820-01-004-2970 has 2 manufacturer part numbers on file: 202577H (Bellofram Corporation), 202577H (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).

What are the specifications of 202577H?

Key specifications for 202577H: Style Designator: SPECIAL SHAPED; Material: RUBBER. 2 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-004-2970 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.

PartsTable Design LLC · partstable.com