Valve, Compressor Service4820-01-256-0688

NSN 4820-01-256-0688 · NIIN 012560688 · Part number A15589

Mueller Brass Co. · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 41947

Government record, cited

NSN 4820-01-256-0688 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-256-0688. Manufacturer of record part number: A15589.

Also searched as 4820-01-256-0688 · 4820012560688 · NIIN 012560688 · 01-256-0688 · FSC 4820 Valves, Nonpowered · CAGE 41947 · A15589

Nearby stock numbers ← 4820-01-256-0670 Valve, Regulating, Fluid Pressure · 4820-01-256-0689 Operator, Remote, Valve →

4820-01-256-0688 — Valves, Nonpowered

Features

Valve,compressor Service — FSC 4820
General Characteristics Item Description: CAST IRON BODY; FOUR-BOLT HOLE TYPE MTG,0.812 IN. DIA BOLT HOLES,4.820 IN. C TO C DISTANCE BETWEEN BOLT HOLES ALONG THE LG; 4.125 IN. TUBE SIZE; BACK-SEATING TYPE IN
1 manufacturer part number on file
Manufacturer of record: Mueller Brass Co.

Identification

NSN: 4820-01-256-0688
NIIN: 012560688
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: A15589
Manufacturer: Mueller Brass Co.

General Description

The Valve,compressor Service, cataloged under National Stock Number 4820-01-256-0688, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mueller Brass Co.. 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. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-256-0688
Primary Part Number	A15589
Item Name	Valve,compressor Service
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Mueller Brass Co.
Status	ACTIVE
General Characteristics Item Description	CAST IRON BODY; FOUR-BOLT HOLE TYPE MTG,0.812 IN. DIA BOLT HOLES,4.820 IN. C TO C DISTANCE BETWEEN BOLT HOLES ALONG THE LG; 4.125 IN. TUBE SIZE; BACK-SEATING TYPE 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

Part Number	Manufacturer
A15589 PRIMARY	Mueller Brass Co. (USA)

Frequently Asked Questions

What is NSN 4820-01-256-0688?

NSN 4820-01-256-0688 is a Valve,compressor Service, manufactured by Mueller Brass Co., classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-256-0688?

NSN 4820-01-256-0688 has 1 manufacturer part number on file: A15589 (Mueller Brass Co.).

What are the specifications of A15589?

Key specifications for A15589: General Characteristics Item Description: CAST IRON BODY; FOUR-BOLT HOLE TYPE MTG,0.812 IN. DIA BOLT HOLES,4.820 IN. C TO C DISTANCE BETWEEN BOLT HOLES ALONG THE LG; 4.125 IN. TUBE SIZE; BACK-SEATING TYPE IN. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-256-0688 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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