PartsTable TECHNICAL DATA SHEET

NSN 4820-01-680-2502Government record, cited

Valve, Safety Relief4820-01-680-2502

NSN 4820-01-680-2502 · NIIN 016802502 · Part number 5652C-G506

Howell Laboratories Inc Dba Howell Laboratories Inc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 22501

Government record, cited

NSN 4820-01-680-2502 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-680-2502. Manufacturer of record part number: 5652C-G506.

Also searched as 4820-01-680-2502 · 4820016802502 · NIIN 016802502 · 01-680-2502 · FSC 4820 Valves, Nonpowered · CAGE 22501 · 5652C-G506 · 5642 NO 23

Nearby stock numbers ← 4820-01-680-2499 Valve, Safety Relief · 4820-01-680-2550 Valve, Ball →

4820-01-680-2502 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Howell Laboratories Inc Dba Howell Laboratories Inc

Identification

NSN: 4820-01-680-2502
NIIN: 016802502
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 5652C-G506
Manufacturer: Howell Laboratories Inc Dba Howell Laboratories Inc

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-680-2502, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.

Catalog Facts

Item Name	Valve,safety Relief
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Howell Laboratories Inc Dba Howell Laboratories Inc (CAGE 22501)

Technical Specifications

Parameter	Value
NSN	4820-01-680-2502
Primary Part Number	5652C-G506
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Howell Laboratories Inc Dba Howell Laboratories Inc
Status	ACTIVE

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
5652C-G506 PRIMARY	Howell Laboratories Inc Dba Howell Laboratories Inc (USA)

Reference documents

Reference	Meaning
5642 NO 23	C/1 Advisory reference — outside the item-of-supply concept Howell Laboratories Inc Dba Howell Laboratories Inc

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 4820-01-680-2502?

NSN 4820-01-680-2502 is a Valve,safety Relief, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-680-2502?

NSN 4820-01-680-2502 has 1 manufacturer part number on file: 5652C-G506 (Howell Laboratories Inc Dba Howell Laboratories Inc).

Is NSN 4820-01-680-2502 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 4820-01-680-2502?

NSN 4820-01-680-2502 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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