PartsTable TECHNICAL DATA SHEET

NSN 4820-01-541-9864Government record, cited

Seat, Valve4820-01-541-9864

NSN 4820-01-541-9864 · NIIN 015419864 · Part number ST053015BT11TS-23

Haywardindl. Products, Inc. · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 73124

Government record, cited

NSN 4820-01-541-9864 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-541-9864. Manufacturer of record part number: ST053015BT11TS-23.

Also searched as 4820-01-541-9864 · 4820015419864 · NIIN 015419864 · 01-541-9864 · FSC 4820 Valves, Nonpowered · CAGE 73124 · ST053015BT11TS-23 · SD053082 ITEM 23

Nearby stock numbers ← 4820-01-541-9858 Valve, Check · 4820-01-541-9877 Valve, Flow Control →

4820-01-541-9864 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Haywardindl. Products, Inc.

Identification

NSN: 4820-01-541-9864
NIIN: 015419864
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: ST053015BT11TS-23
Manufacturer: Haywardindl. Products, Inc.

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-541-9864, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Haywardindl. Products, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	Seat,valve
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Haywardindl. Products, Inc. (CAGE 73124)

Technical Specifications

Parameter	Value
NSN	4820-01-541-9864
Primary Part Number	ST053015BT11TS-23
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Haywardindl. Products, Inc.
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
ST053015BT11TS-23 PRIMARY	Haywardindl. Products, Inc. (USA)

Reference documents

Reference	Meaning
SD053082 ITEM 23	D/9 Drawing number reference only Haywardindl. Products, 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 4820-01-541-9864?

NSN 4820-01-541-9864 is a Seat,valve, manufactured by Haywardindl. Products, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-541-9864?

NSN 4820-01-541-9864 has 1 manufacturer part number on file: ST053015BT11TS-23 (Haywardindl. Products, Inc.).

Is NSN 4820-01-541-9864 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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