PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

325Disk,valve

Lawler Manufacturing Company, Inc. · NSN 4820-00-885-3001 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-885-3001 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-885-3001. Primary manufacturer part number: 325.
Features
  • Disk,valve — FSC 4820
  • Inside Diameter: 0.781 INCHES NOMINAL IN
  • Material: RUBBER SYNTHETIC
  • Style Designator: PLAIN
  • Media for Which Designed: WATER, SALT
  • Pressure Rating: 30.0 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 70.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
  • Outside Diameter: 1.641 INCHES NOMINAL IN
  • 3 verified cross-references
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Rubber Synthetic construction
General Description

The Disk,valve, cataloged under National Stock Number 4820-00-885-3001, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Lawler Manufacturing Company, Inc.. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-885-3001
Primary Part Number325
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLawler Manufacturing Company, Inc.
StatusACTIVE
Inside Diameter0.781 INCHES NOMINAL IN
MaterialRUBBER SYNTHETIC
Style DesignatorPLAIN
Media for Which DesignedWATER, SALT
Pressure Rating30.0 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 70.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Outside Diameter1.641 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4310-01-131-3682325L INTERCHANGEABLE
Compressor,reciprocating
Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
Cross-Reference Index
Part NumberManufacturer
325 Lawler Manufacturing Company, Inc. (USA)
325L Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA)
71993PC14 Lawler Manufacturing Company, Inc. (USA)
Related Parts
4310-01-131-3682INTERCHANGEABLE
COMPRESSOR,RECIPROCATING
325L

Frequently Asked Questions

What is NSN 4820-00-885-3001?

NSN 4820-00-885-3001 is a Disk,valve, manufactured by Lawler Manufacturing Company, Inc., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-885-3001?

NSN 4820-00-885-3001 has 3 cross-referenced part numbers: 325 (Lawler Manufacturing Company, Inc.), 325L (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 71993PC14 (Lawler Manufacturing Company, Inc.).

What NSN replaces 4820-00-885-3001?

There is 1 known substitute for 4820-00-885-3001: 4310-01-131-3682. Verify interchangeability with system specifications before substitution.

What are the specifications of 325?

Key specifications for 325: Inside Diameter: 0.781 INCHES NOMINAL IN; Material: RUBBER SYNTHETIC; Overall Height: 0.344 INCHES NOMINAL IN; Style Designator: PLAIN. 7 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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