Valve, Safety Relief4820-01-678-7778

NSN 4820-01-678-7778 · NIIN 016787778 · Part number AJ15513

Mueller Refrigeration Products Co · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 1BND5

Government record, cited

NSN 4820-01-678-7778 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-678-7778. Manufacturer of record part number: AJ15513.

Also searched as 4820-01-678-7778 · 4820016787778 · NIIN 016787778 · 01-678-7778 · FSC 4820 Valves, Nonpowered · CAGE 1BND5 · AJ15513

Nearby stock numbers ← 4820-01-678-7776 Valve, Regulating, Fluid Pressure · 4820-01-678-7904 Valve, Flow Control →

4820-01-678-7778 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Nominal Length: 2.43 INCHES ALL ENDS IN
Minimum Operating Temp: -40.0 CELSIUS DEGC
Nominal Thread Size: 0.375 INCHES FIRST END IN
Nominal Thread Size: 0.50 INCHES SECOND END IN
Mounting Facility: THREADED FASTENER
1 manufacturer part number on file
Manufacturer of record: Mueller Refrigeration Products Co

Identification

NSN: 4820-01-678-7778
NIIN: 016787778
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: AJ15513
Manufacturer: Mueller Refrigeration Products Co

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-678-7778, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mueller Refrigeration Products Co. Government technical data includes 5 specifications, 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	4820-01-678-7778
Primary Part Number	AJ15513
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Mueller Refrigeration Products Co
Status	ACTIVE
Nominal Length	2.43 INCHES ALL ENDS IN
Minimum Operating Temp	-40.0 CELSIUS DEGC
Nominal Thread Size	0.375 INCHES FIRST END IN
Nominal Thread Size	0.50 INCHES SECOND END IN
Mounting Facility	THREADED FASTENER

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
AJ15513 PRIMARY	Mueller Refrigeration Products Co (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 4820-01-678-7778?

NSN 4820-01-678-7778 is a Valve,safety Relief, manufactured by Mueller Refrigeration Products Co, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-678-7778?

NSN 4820-01-678-7778 has 1 manufacturer part number on file: AJ15513 (Mueller Refrigeration Products Co).

What are the specifications of AJ15513?

Key specifications for AJ15513: Nominal Length: 2.43 INCHES ALL ENDS IN; Minimum Operating Temp: -40.0 CELSIUS DEGC; Nominal Thread Size: 0.375 INCHES FIRST END IN; Nominal Thread Size: 0.50 INCHES SECOND END IN. 5 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-678-7778 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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