PartsTable TECHNICAL DATA SHEET

JULY 2026Technical Data Sheet

261-00Seat,valve

Name: 261-00
SKU: 4820-01-123-2999

Trac Regulator Co., Inc. Dba Trac Regulator Co Inc · NSN 4820-01-123-2999 · FSC 4820 · No Item Name Available

Verified by PartsTable

NSN 4820-01-123-2999 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-123-2999. Primary manufacturer part number: 261-00.

4820-01-123-2999 — No Item Name Available illustration

Features

Seat,valve — FSC 4820
Material: COPPER ALLOY OVERALL
6 verified cross-references
Primary manufacturer: Trac Regulator Co., Inc. Dba Trac Regulator Co Inc

Applications

Flow control in piping systems
Pressure regulation
Steam and fluid isolation
Applications requiring Copper Alloy Overall construction

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-123-2999, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-123-2999
Primary Part Number	261-00
Item Name	Seat,valve
FSC / FSG	4820 / 48 — No Item Name Available
Manufacturer	Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Status	ACTIVE
Material	COPPER ALLOY OVERALL

Lifecycle & Compliance

Acquisition Status	ACTIVE
HAZMAT	No

⇄ Verified Substitutes 9

4410-00-070-944926100 INTERCHANGEABLE

Wrench,nozzle,safety,valve

Emerson Automation Solutions Final Control Us Lp Div Navy Product Team

6550-00-243-3398 INTERCHANGEABLE

Sudan III Stain

5130-00-402-817626100 INTERCHANGEABLE

Brush,wire,rotary Cup

Weiler Corporation

5330-00-505-3712 INTERCHANGEABLE

Seal,plain Encased

6685-00-606-8178 INTERCHANGEABLE

Thermostat,flow Control

5955-01-125-2222 INTERCHANGEABLE

Oscillator,pulse Delay

9905-01-531-98032610.0 INTERCHANGEABLE

Tag,marker

Go Electronics Inc. Dba Control Design Supply

6515-01-663-412326100 INTERCHANGEABLE

Tip Set,ear,tympanometer

Welch Allyn, Inc.

7830-01-673-8079 INTERCHANGEABLE

Dumbbell,gymnastic

Cross-Reference Index

Part Number	Manufacturer
261	Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40145-19	Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40055-04-35	Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40145 PART 261	Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
40145 PIECE 19	Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
261-00 PRIMARY	Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)

Related Parts

4410-00-070-9449INTERCHANGEABLE

WRENCH,NOZZLE,SAFETY,VALVE

26100

6550-00-243-3398INTERCHANGEABLE

SUDAN III STAIN

5130-00-402-8176INTERCHANGEABLE

BRUSH,WIRE,ROTARY CUP

26100

5330-00-505-3712INTERCHANGEABLE

SEAL,PLAIN ENCASED

6685-00-606-8178INTERCHANGEABLE

THERMOSTAT,FLOW CONTROL

5955-01-125-2222INTERCHANGEABLE

OSCILLATOR,PULSE DELAY

9905-01-531-9803INTERCHANGEABLE

TAG,MARKER

2610.0

6515-01-663-4123INTERCHANGEABLE

TIP SET,EAR,TYMPANOMETER

26100

7830-01-673-8079INTERCHANGEABLE

DUMBBELL,GYMNASTIC

Frequently Asked Questions

What is NSN 4820-01-123-2999?

NSN 4820-01-123-2999 is a Seat,valve, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-123-2999?

NSN 4820-01-123-2999 has 6 cross-referenced part numbers: 261 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40145-19 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40055-04-35 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40145 PART 261 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40145 PIECE 19 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc) and 1 more.

What NSN replaces 4820-01-123-2999?

There are 9 known substitutes for 4820-01-123-2999: 4410-00-070-9449, 6550-00-243-3398, 5130-00-402-8176 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 261-00?

Key specifications for 261-00: Material: COPPER ALLOY OVERALL. 1 total characteristics are documented in the Federal Logistics Information System.

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.

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