PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C3650 1385 3/8 180T300PSIValve,safety Relief

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-262-7515 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-262-7515 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-262-7515. Primary manufacturer part number: C3650 1385 3/8 180T300PSI.
Features
  • Valve,safety Relief — FSC 4820
  • Media for Which Designed: WATER, FRESH SECOND RESPONSE
  • Maximum Operating Temp: 180.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Flow Control Device: DISK
  • Bonnet Type: INSIDE SCREW
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
  • Connection Style: SOCKET WITH BRAZING RING ALL ENDS
  • Material: NICKEL ALLOY SEAT
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Rubber Butadiene-Acrylonitrile Class Nbr Packing construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-262-7515, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-262-7515
Primary Part NumberC3650 1385 3/8 180T300PSI
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Media for Which DesignedWATER, FRESH SECOND RESPONSE
Maximum Operating Temp180.0 FAHRENHEIT SINGLE RESPONSE DEGF
Flow Control DeviceDISK
Bonnet TypeINSIDE SCREW
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
Connection StyleSOCKET WITH BRAZING RING ALL ENDS
MaterialNICKEL ALLOY SEAT
MaterialNICKEL ALLOY STEM
Valve Operation MethodAUTOMATIC
Disk Loading MethodSPRING
Adjustable Pressure Range+180.0 TO 300.0 POUNDS PER SQUARE INCH LBS
Style DesignatorANGLE
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE
Connection TypeUNTHREADED INTERNAL PIPE ALL ENDS
Nominal Pipe Size Accommodated0.375 INCHES ALL ENDS IN
Operating Pressure400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MaterialBRONZE BODY
Bonnet Attachment MethodTHREADED
Media for Which DesignedAIR FIRST RESPONSE
Furnished Items and Quantity2 NUT AND 2 TAILPIECE AND 1 LEVER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4820-01-197-3710YB2385G224 INTERCHANGEABLE
Valve,safety Relief
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-262-8427YB238F223 INTERCHANGEABLE
Valve,safety Relief
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-268-83861385PL4149-4126-65T100PSI INTERCHANGEABLE
Valve,safety Relief
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-270-64141385 P/L 2385C226 AND C3650 INTERCHANGEABLE
Valve,safety Relief
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-282-8463YB2385C224 INTERCHANGEABLE
Valve,safety Relief
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-312-72901385 P/L2385D222 INTERCHANGEABLE
Valve,safety Relief
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-317-274420277735 INTERCHANGEABLE
Valve,safety Relief
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-354-4737E3650 INTERCHANGEABLE
Valve,relief,pressure and Temper
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
1385 3/8 PL4149 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
C3650 1385 3/8 180T300PSI PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
C3650 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4820-01-197-3710INTERCHANGEABLE
VALVE,SAFETY RELIEF
YB2385G224
4820-01-262-8427INTERCHANGEABLE
VALVE,SAFETY RELIEF
YB238F223
4820-01-268-8386INTERCHANGEABLE
VALVE,SAFETY RELIEF
1385PL4149-4126-65T100PSI
4820-01-270-6414INTERCHANGEABLE
VALVE,SAFETY RELIEF
1385 P/L 2385C226 AND C3650
4820-01-282-8463INTERCHANGEABLE
VALVE,SAFETY RELIEF
YB2385C224
4820-01-312-7290INTERCHANGEABLE
VALVE,SAFETY RELIEF
1385 P/L2385D222
4820-01-317-2744INTERCHANGEABLE
VALVE,SAFETY RELIEF
20277735
4820-01-354-4737INTERCHANGEABLE
VALVE,RELIEF,PRESSURE AND TEMPER
E3650

Frequently Asked Questions

What is NSN 4820-01-262-7515?

NSN 4820-01-262-7515 is a Valve,safety Relief, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-262-7515?

NSN 4820-01-262-7515 has 3 cross-referenced part numbers: 1385 3/8 PL4149 (Leslie Controls, Inc. Dba Leslie Controls Inc), C3650 1385 3/8 180T300PSI (Leslie Controls, Inc. Dba Leslie Controls Inc), C3650 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-262-7515?

There are 8 known substitutes for 4820-01-262-7515: 4820-01-197-3710, 4820-01-262-8427, 4820-01-268-8386 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of C3650 1385 3/8 180T300PSI?

Key specifications for C3650 1385 3/8 180T300PSI: Media for Which Designed: WATER, FRESH SECOND RESPONSE; Maximum Operating Temp: 180.0 FAHRENHEIT SINGLE RESPONSE DEGF; Flow Control Device: DISK; Bonnet Type: INSIDE SCREW. 20 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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