Seat, Valve4820-01-039-5993

NSN 4820-01-039-5993 · NIIN 010395993

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-039-5993 · 4820010395993 · NIIN 010395993 · 01-039-5993 · FSC 4820 Valves, Nonpowered

Nearby stock numbers ← 4820-01-039-5972 Valve, Safety Relief · 4820-01-039-5994 Seat, Valve →

4820-01-039-5993 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Surface Treatment Document and Classification: HS-138 TYPE 11 MFR REF SINGLE TREATMENT RESPONSE OVERALL
Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Surface Treatment: PASSIVATE OVERALL
Material: STEEL COMP 420 OVERALL

Identification

NSN: 4820-01-039-5993
NIIN: 010395993
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-039-5993, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-039-5993
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Surface Treatment Document and Classification	HS-138 TYPE 11 MFR REF SINGLE TREATMENT RESPONSE OVERALL
Hardness Rating	45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
Material Document and Classification	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Surface Treatment	PASSIVATE OVERALL
Material	STEEL COMP 420 OVERALL

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

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
39-04518	3/2 Design control — primary reference U.S. Government activity

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 4820-01-039-5993?

NSN 4820-01-039-5993 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-01-039-5993?

Key specifications for 4820-01-039-5993: Surface Treatment Document and Classification: HS-138 TYPE 11 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL; Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Surface Treatment: PASSIVATE OVERALL. 5 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-039-5993 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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