Head, Safety, Pressure Relief4820-01-663-7554

NSN 4820-01-663-7554 · NIIN 016637554 · Part number 170117-7457 TYPE PROVAC-BI

Zook Enterprises, Llc Div Zook · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 67158

Government record, cited

NSN 4820-01-663-7554 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-663-7554. Manufacturer of record part number: 170117-7457 TYPE PROVAC-BI.

Also searched as 4820-01-663-7554 · 4820016637554 · NIIN 016637554 · 01-663-7554 · FSC 4820 Valves, Nonpowered · CAGE 67158 · 170117-7457 TYPE PROVAC-BI · 0497-02-QEC · 40101731 · SC18-0497-02-QEC · SM-0497-SGK

Nearby stock numbers ← 4820-01-663-7512 Valve, Flow Control · 4820-01-663-7556 Valve, Check →

4820-01-663-7554 — Valves, Nonpowered

Features

Head,safety,pressure Relief — FSC 4820
5 manufacturer part numbers on file
Manufacturer of record: Zook Enterprises, Llc Div Zook

Identification

NSN: 4820-01-663-7554
NIIN: 016637554
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 170117-7457 TYPE PROVAC-BI
Manufacturer: Zook Enterprises, Llc Div Zook

General Description

The Head,safety,pressure Relief, cataloged under National Stock Number 4820-01-663-7554, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Zook Enterprises, Llc Div Zook. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Catalog Facts

Item Name	Head,safety,pressure Relief
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Score Marine Ltd (CAGE KCP47); Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt) (CAGE KCUC6); Zook Enterprises, Llc Div Zook (CAGE 67158)

Technical Specifications

Parameter	Value
NSN	4820-01-663-7554
Primary Part Number	170117-7457 TYPE PROVAC-BI
Item Name	Head,safety,pressure Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Zook Enterprises, Llc Div Zook
Status	ACTIVE

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
0497-02-QEC	Score Marine Ltd (GBR)
40101731	Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt) (GBR)
SC18-0497-02-QEC	Score Marine Ltd (GBR)
SM-0497-SGK	Score Marine Ltd (GBR)
170117-7457 TYPE PROVAC-BI PRIMARY	Zook Enterprises, Llc Div Zook (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 4820-01-663-7554?

NSN 4820-01-663-7554 is a Head,safety,pressure Relief, manufactured by Zook Enterprises, Llc Div Zook, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-663-7554?

NSN 4820-01-663-7554 has 5 manufacturer part numbers on file: 0497-02-QEC (Score Marine Ltd), 40101731 (Ministry of Defence, Future Aircraft Carrier Ipt (cvf Ipt)), SC18-0497-02-QEC (Score Marine Ltd), SM-0497-SGK (Score Marine Ltd), 170117-7457 TYPE PROVAC-BI (Zook Enterprises, Llc Div Zook).

Is NSN 4820-01-663-7554 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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