PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20260601K 100M-1KRValve,check

Griswold Industries Dba Cla-Val Co · NSN 4820-01-511-0372 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-511-0372 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-511-0372. Primary manufacturer part number: 20260601K 100M-1KR.
Features
  • Valve,check — FSC 4820
  • Material: COPPER ALLOY BODY
  • Material Document and Classification: MIL-B-16541 GR.A MIL SPEC SINGLE MATERIAL RESPONSE BODY
  • Style Designator: STRAIGHT THRU
  • Valve Operation Method: AUTOMATIC
  • Disk Loading Method: SPRING
  • 4 verified cross-references
  • Primary manufacturer: Griswold Industries Dba Cla-Val Co
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Body construction
General Description

The Valve,check, cataloged under National Stock Number 4820-01-511-0372, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Griswold Industries Dba Cla-Val Co. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-511-0372
Primary Part Number20260601K 100M-1KR
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerGriswold Industries Dba Cla-Val Co
StatusACTIVE
MaterialCOPPER ALLOY BODY
Material Document and ClassificationMIL-B-16541 GR.A MIL SPEC SINGLE MATERIAL RESPONSE BODY
Style DesignatorSTRAIGHT THRU
Valve Operation MethodAUTOMATIC
Disk Loading MethodSPRING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5360-00-874-0414 INTERCHANGEABLE
Spring,flat
2910-01-070-79793071147 INTERCHANGEABLE
Sleeve,cooling,fuel Injection No
Cummins Inc.
5365-01-266-4163NC202606 INTERCHANGEABLE
Spacer,ring
Leslie Controls, Inc. Dba Leslie Controls Inc
5330-01-316-5249 INTERCHANGEABLE
Parts Kit,seal Replacement,mecha
4810-01-330-088949304 INTERCHANGEABLE
Valve,globe
Griswold Industries Dba Cla-Val Co
6210-01-352-290049304 INTERCHANGEABLE
Light,indicator
Hdt Expeditionary Systems Inc
3040-01-478-036532-391 INTERCHANGEABLE
Housing,mechanical Drive
Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
4820-01-511-896649304-01H-100M-1KR INTERCHANGEABLE
Valve,diaphragm,stop
Griswold Industries Dba Cla-Val Co
5310-01-518-582594662-01C INTERCHANGEABLE
Nut,self-Locking,hexagon
Griswold Industries Dba Cla-Val Co
4820-01-518-813749304 INTERCHANGEABLE
Valve,diaphragm,stop
Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
Part NumberManufacturer
1 1/2" 100M-1KR Griswold Industries Dba Cla-Val Co (USA)
49304 Griswold Industries Dba Cla-Val Co (USA)
20260601K 100M-1KR PRIMARY Griswold Industries Dba Cla-Val Co (USA)
202606 Griswold Industries Dba Cla-Val Co (USA)
Related Parts
5360-00-874-0414INTERCHANGEABLE
SPRING,FLAT
2910-01-070-7979INTERCHANGEABLE
SLEEVE,COOLING,FUEL INJECTION NO
3071147
5365-01-266-4163INTERCHANGEABLE
SPACER,RING
NC202606
5330-01-316-5249INTERCHANGEABLE
PARTS KIT,SEAL REPLACEMENT,MECHA
4810-01-330-0889INTERCHANGEABLE
VALVE,GLOBE
49304
6210-01-352-2900INTERCHANGEABLE
LIGHT,INDICATOR
49304
3040-01-478-0365INTERCHANGEABLE
HOUSING,MECHANICAL DRIVE
32-391
4820-01-511-8966INTERCHANGEABLE
VALVE,DIAPHRAGM,STOP
49304-01H-100M-1KR
5310-01-518-5825INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
94662-01C
4820-01-518-8137INTERCHANGEABLE
VALVE,DIAPHRAGM,STOP
49304
4820-01-533-4136INTERCHANGEABLE
VALVE,DIAPHRAGM,STOP
200493A
4210-01-586-0644INTERCHANGEABLE
VALVE,CONTROL,AUTOMATIC SPRINKLE
3/8-100M-1KR

Frequently Asked Questions

What is NSN 4820-01-511-0372?

NSN 4820-01-511-0372 is a Valve,check, manufactured by Griswold Industries Dba Cla-Val Co, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-511-0372?

NSN 4820-01-511-0372 has 4 cross-referenced part numbers: 1 1/2" 100M-1KR (Griswold Industries Dba Cla-Val Co), 49304 (Griswold Industries Dba Cla-Val Co), 20260601K 100M-1KR (Griswold Industries Dba Cla-Val Co), 202606 (Griswold Industries Dba Cla-Val Co).

What NSN replaces 4820-01-511-0372?

There are 12 known substitutes for 4820-01-511-0372: 5360-00-874-0414, 2910-01-070-7979, 5365-01-266-4163 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20260601K 100M-1KR?

Key specifications for 20260601K 100M-1KR: Material: COPPER ALLOY BODY; Part Name Assigned by Controlling Agency: 1.5 INCH HYTROL VALVE IN; Material Document and Classification: MIL-B-16541 GR.A MIL SPEC SINGLE MATERIAL RESPONSE BODY; Style Designator: STRAIGHT THRU. 6 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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