Valve, Safety Relief4820-01-665-6676

NSN 4820-01-665-6676 · NIIN 016656676 · Part number H-900-HP-SS-L-1/4-E

Ham-Let U S a Inc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 6Q8A1

Government record, cited

NSN 4820-01-665-6676 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-665-6676. Manufacturer of record part number: H-900-HP-SS-L-1/4-E.

Also searched as 4820-01-665-6676 · 4820016656676 · NIIN 016656676 · 01-665-6676 · FSC 4820 Valves, Nonpowered · CAGE 6Q8A1 · H-900-HP-SS-L-1/4-E

Nearby stock numbers ← 4820-01-665-6601 Valve, Ball · 4820-01-665-6713 Parts Kit, Valve →

4820-01-665-6676 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Material: STEEL COMP 316 BODY
1 manufacturer part number on file
Manufacturer of record: Ham-Let U S a Inc

Identification

NSN: 4820-01-665-6676
NIIN: 016656676
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: H-900-HP-SS-L-1/4-E
Manufacturer: Ham-Let U S a Inc

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-665-6676, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ham-Let U S a Inc. 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	4820-01-665-6676
Primary Part Number	H-900-HP-SS-L-1/4-E
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Ham-Let U S a Inc
Status	ACTIVE
Material	STEEL COMP 316 BODY

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
H-900-HP-SS-L-1/4-E PRIMARY	Ham-Let U S a Inc (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 4820-01-665-6676?

NSN 4820-01-665-6676 is a Valve,safety Relief, manufactured by Ham-Let U S a Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-665-6676?

NSN 4820-01-665-6676 has 1 manufacturer part number on file: H-900-HP-SS-L-1/4-E (Ham-Let U S a Inc).

What are the specifications of H-900-HP-SS-L-1/4-E?

Key specifications for H-900-HP-SS-L-1/4-E: Special Features: END CONNECTION LET LOK. END CONNECTION1/4 INCH IN; Part Name Assigned by Controlling Agency: RELIEF VALVE; Material: STEEL COMP 316 BODY. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-665-6676 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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