Diaphragm, Special S4820-00-138-5948

NSN 4820-00-138-5948 · NIIN 001385948 · Part number 4-73-41-54-017-BB-1

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

Government record, cited

NSN 4820-00-138-5948 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-138-5948. Manufacturer of record part number: 4-73-41-54-017-BB-1.

Also searched as 4820-00-138-5948 · 4820001385948 · NIIN 001385948 · 00-138-5948 · FSC 4820 Valves, Nonpowered · CAGE 01170 · 4-73-41-54-017-BB-1 · 746402-1

Nearby stock numbers ← 4820-00-138-5947 Diaphragm, Special S · 4820-00-138-5949 Diaphragm, Actuator Valve, Special →

4820-00-138-5948 — Valves, Nonpowered

Features

Diaphragm,special S — FSC 4820
2 manufacturer part numbers on file
Manufacturer of record: Bellofram Corporation

Identification

NSN: 4820-00-138-5948
NIIN: 001385948
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 4-73-41-54-017-BB-1
Manufacturer: Bellofram Corporation

General Description

The Diaphragm,special S, cataloged under National Stock Number 4820-00-138-5948, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bellofram Corporation. 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	Diaphragm,special S
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Bellofram Corporation (CAGE 01170); Hamilton Sundstrand Corporation Dba Collins Aerospace (CAGE 73030)

Technical Specifications

Parameter	Value
NSN	4820-00-138-5948
Primary Part Number	4-73-41-54-017-BB-1
Item Name	Diaphragm,special S
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Bellofram Corporation
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)

Cross-Reference Index

Part Number	Manufacturer
4-73-41-54-017-BB-1 PRIMARY	Bellofram Corporation (USA)
746402-1	Hamilton Sundstrand Corporation Dba Collins Aerospace (USA)

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 4820-00-138-5948?

NSN 4820-00-138-5948 is a Diaphragm,special S, manufactured by Bellofram Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-00-138-5948?

NSN 4820-00-138-5948 has 2 manufacturer part numbers on file: 4-73-41-54-017-BB-1 (Bellofram Corporation), 746402-1 (Hamilton Sundstrand Corporation Dba Collins Aerospace).

Is NSN 4820-00-138-5948 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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