PartsTable TECHNICAL DATA SHEET

NSN 4820-01-157-2977Government record, cited

Adapter Plate Assembly4820-01-157-2977

NSN 4820-01-157-2977 · NIIN 011572977 · Part number 50M-154

Metrex Valve Corp. Dba Metrex Valve Corp · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 21013

Government record, cited

NSN 4820-01-157-2977 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-157-2977. Manufacturer of record part number: 50M-154.

Also searched as 4820-01-157-2977 · 4820011572977 · NIIN 011572977 · 01-157-2977 · FSC 4820 Valves, Nonpowered · CAGE 21013 · 50M-154 · N-7189

Nearby stock numbers ← 4820-01-157-2976 Piston, Valve · 4820-01-157-2978 →

4820-01-157-2977 — Valves, Nonpowered

Features

Adapter Plate Assembly — FSC 4820
General Characteristics Item Description: STEEL,CARBON;SILVER BRAZE;1.125 IN.H;3.000 IN.ID;4.560 IN.OD;8 HOLES IN
1 manufacturer part number on file
Manufacturer of record: Metrex Valve Corp. Dba Metrex Valve Corp

Identification

NSN: 4820-01-157-2977
NIIN: 011572977
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 50M-154
Manufacturer: Metrex Valve Corp. Dba Metrex Valve Corp

General Description

The Adapter Plate Assembly, cataloged under National Stock Number 4820-01-157-2977, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Metrex Valve Corp. Dba Metrex Valve Corp. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	4820-01-157-2977
Primary Part Number	50M-154
Item Name	Adapter Plate Assembly
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Metrex Valve Corp. Dba Metrex Valve Corp
Status	ACTIVE
General Characteristics Item Description	STEEL,CARBON;SILVER BRAZE;1.125 IN.H;3.000 IN.ID;4.560 IN.OD;8 HOLES IN

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL Q — CCL Item — Commerce Control List
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
50M-154 PRIMARY	Metrex Valve Corp. Dba Metrex Valve Corp (USA)

Reference documents

Reference	Meaning
N-7189	C/1 Advisory reference — outside the item-of-supply concept Metrex Valve Corp. Dba Metrex Valve Corp

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 4820-01-157-2977?

NSN 4820-01-157-2977 is a Adapter Plate Assembly, manufactured by Metrex Valve Corp. Dba Metrex Valve Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-157-2977?

NSN 4820-01-157-2977 has 1 manufacturer part number on file: 50M-154 (Metrex Valve Corp. Dba Metrex Valve Corp).

What are the specifications of 50M-154?

Key specifications for 50M-154: General Characteristics Item Description: STEEL,CARBON;SILVER BRAZE;1.125 IN.H;3.000 IN.ID;4.560 IN.OD;8 HOLES IN. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-157-2977 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.

What is the DEMIL code for NSN 4820-01-157-2977?

NSN 4820-01-157-2977 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.

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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