Disk, Valve4820-00-336-5503

NSN 4820-00-336-5503 · NIIN 003365503 · Part number VBB815

Ashcroft Inc Dba Heise · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 38056

Government record, cited

NSN 4820-00-336-5503 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-336-5503. Manufacturer of record part number: VBB815.

Also searched as 4820-00-336-5503 · 4820003365503 · NIIN 003365503 · 00-336-5503 · FSC 4820 Valves, Nonpowered · CAGE 38056 · VBB815

Nearby stock numbers ← 4820-00-336-5502 Stem, Fluid Valve · 4820-00-336-5504 Guide, Disc →

4820-00-336-5503 — Valves, Nonpowered

Features

Disk,valve — FSC 4820
Nominal Thread Size: 0.250 INCHES IN
Thread Class: 2A A
Material: STEEL
Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
1 manufacturer part number on file
Manufacturer of record: Ashcroft Inc Dba Heise

Identification

NSN: 4820-00-336-5503
NIIN: 003365503
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: VBB815
Manufacturer: Ashcroft Inc Dba Heise

General Description

The Disk,valve, cataloged under National Stock Number 4820-00-336-5503, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 4 specifications, 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	4820-00-336-5503
Primary Part Number	VBB815
Item Name	Disk,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Ashcroft Inc Dba Heise
Status	ACTIVE
Nominal Thread Size	0.250 INCHES IN
Thread Class	2A A
Material	STEEL
Thread Series Designator	UNIFIED NATIONAL COARSE (UNC)

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
VBB815 PRIMARY	Ashcroft Inc Dba Heise (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 4820-00-336-5503?

NSN 4820-00-336-5503 is a Disk,valve, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-00-336-5503?

NSN 4820-00-336-5503 has 1 manufacturer part number on file: VBB815 (Ashcroft Inc Dba Heise).

What are the specifications of VBB815?

Key specifications for VBB815: Nominal Thread Size: 0.250 INCHES IN; Special Features: 2.250 IN. LG;SHAFT 2.500 IN. OD;FLANGE 0.400 IN. OD,0.100 IN. LG;0.281 IN. SEATING RADIUS IN; Thread Class: 2A A; Material: STEEL. 4 specifications are documented in the U.S. Government catalog.

Is NSN 4820-00-336-5503 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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