Disk, Valve4820-01-172-8332

NSN 4820-01-172-8332 · NIIN 011728332 · Part number 6553-255 PIECE 5

Derbyshire Machine & Tool Co · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 71905

Government record, cited

NSN 4820-01-172-8332 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-172-8332. Manufacturer of record part number: 6553-255 PIECE 5.

Also searched as 4820-01-172-8332 · 4820011728332 · NIIN 011728332 · 01-172-8332 · FSC 4820 Valves, Nonpowered · CAGE 71905 · 6553-255 PIECE 5

Nearby stock numbers ← 4820-01-172-8331 Seat, Valve · 4820-01-172-8335 Disk, Valve →

4820-01-172-8332 — Valves, Nonpowered

Features

Disk,valve — FSC 4820
Outside Diameter: 5.295 INCHES NOMINAL IN
Style Designator: PLUG
Seat Angle: 45.0 DEGREES NOMINAL
Nominal Thread Size: 2.250 INCHES IN
Thread Class: 2B
Thread Quantity Per Inch: 12
Material: NICKEL ALLOY

Identification

NSN: 4820-01-172-8332
NIIN: 011728332
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 6553-255 PIECE 5
Manufacturer: Derbyshire Machine & Tool Co

General Description

The Disk,valve, cataloged under National Stock Number 4820-01-172-8332, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-172-8332
Primary Part Number	6553-255 PIECE 5
Item Name	Disk,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Derbyshire Machine & Tool Co
Status	ACTIVE
Outside Diameter	5.295 INCHES NOMINAL IN
Style Designator	PLUG
Seat Angle	45.0 DEGREES NOMINAL
Nominal Thread Size	2.250 INCHES IN
Thread Class	2B
Thread Quantity Per Inch	12
Material	NICKEL ALLOY
Thread Series Designator	UN

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
6553-255 PIECE 5 PRIMARY	Derbyshire Machine & Tool Co (USA)
6553-255 PIECE 5	Huntington Ingalls Inc Div Newport News Shipbuilding (USA)
6553-255 PIECE 5 PRIMARY	Tate Andale, Llc (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 4820-01-172-8332?

NSN 4820-01-172-8332 is a Disk,valve, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-172-8332?

NSN 4820-01-172-8332 has 3 manufacturer part numbers on file: 6553-255 PIECE 5 (Derbyshire Machine & Tool Co), 6553-255 PIECE 5 (Huntington Ingalls Inc Div Newport News Shipbuilding), 6553-255 PIECE 5 (Tate Andale, Llc).

What are the specifications of 6553-255 PIECE 5?

Key specifications for 6553-255 PIECE 5: Overall Height: 4.822 INCHES NOMINAL IN; Outside Diameter: 5.295 INCHES NOMINAL IN; Style Designator: PLUG; Seat Angle: 45.0 DEGREES NOMINAL. 8 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-172-8332 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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