PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

KC49679Valve,check

Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division · NSN 4820-01-448-4645 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-448-4645 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-448-4645. Primary manufacturer part number: KC49679.
Features
  • Valve,check — FSC 4820
  • Valve Operation Method: AUTOMATIC
  • Maximum Operating Temp: 840.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Operating Pressure: 36.5 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Minimum Operating Temp: -65.0 FAHRENHEIT DEGF
  • Media for Which Designed: AIR SINGLE RESPONSE
  • Flow Control Device: DISK
  • Disk Loading Method: SPRING
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,check, cataloged under National Stock Number 4820-01-448-4645, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, 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
NSN4820-01-448-4645
Primary Part NumberKC49679
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division
StatusACTIVE
Valve Operation MethodAUTOMATIC
Maximum Operating Temp840.0 FAHRENHEIT SINGLE RESPONSE DEGF
Operating Pressure36.5 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Minimum Operating Temp-65.0 FAHRENHEIT DEGF
Media for Which DesignedAIR SINGLE RESPONSE
Flow Control DeviceDISK
Disk Loading MethodSPRING
Mounting PositionHORIZONTAL OR VERTICAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-010-3320 INTERCHANGEABLE
Washer,lock
2810-00-118-944440049 INTERCHANGEABLE
Cover,exhaust Valve,rocker Box
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
6660-00-670-4850ID353BGMQ10 INTERCHANGEABLE
Indicator-Recorder,transmissomet
Joint Electronics Type Designation System
5355-01-181-056040049 INTERCHANGEABLE
Dial,scale
Republic Machinery Co Inc Dba Republic Lagun Machine Tool Co
2910-01-206-090540049 INTERCHANGEABLE
Pump,fuel,electrical
Zenith Fuel Systems Llc
4130-01-336-715631212-91 INTERCHANGEABLE
Head Assembly Extru
Wilshire Corp
4820-01-394-759240049-1 INTERCHANGEABLE
Valve Adapter Plate
Morpac Industries, Inc Div Actuator
4320-01-498-482640049 INTERCHANGEABLE
Pump,hydraulic Ram,hand Driven
Parker Hannifin Corporation Div Hydraulic Systems Division
8465-01-541-831040049 INTERCHANGEABLE
Hydration System
Camelbak Products, Llc Dba Camelbak
5120-01-610-582640049 INTERCHANGEABLE
Wrench,box and Open End,combinat
Wiha Quality Tools
Cross-Reference Index
Part NumberManufacturer
KC49679-1 Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)
KC49679-1 Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division (USA)
4004-9 Aerospace Systems and Components, Inc. (USA)
KC49679 PRIMARY Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division (USA)
Related Parts
5310-00-010-3320INTERCHANGEABLE
WASHER,LOCK
2810-00-118-9444INTERCHANGEABLE
COVER,EXHAUST VALVE,ROCKER BOX
40049
6660-00-670-4850INTERCHANGEABLE
INDICATOR-RECORDER,TRANSMISSOMET
ID353BGMQ10
5355-01-181-0560INTERCHANGEABLE
DIAL,SCALE
40049
2910-01-206-0905INTERCHANGEABLE
PUMP,FUEL,ELECTRICAL
40049
4130-01-336-7156INTERCHANGEABLE
HEAD ASSEMBLY EXTRU
31212-91
4820-01-394-7592INTERCHANGEABLE
VALVE ADAPTER PLATE
40049-1
4320-01-498-4826INTERCHANGEABLE
PUMP,HYDRAULIC RAM,HAND DRIVEN
40049
8465-01-541-8310INTERCHANGEABLE
HYDRATION SYSTEM
40049
5120-01-610-5826INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
40049
5305-01-653-9121INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
4-0049
5935-01-701-6382INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
4004-9

Frequently Asked Questions

What is NSN 4820-01-448-4645?

NSN 4820-01-448-4645 is a Valve,check, manufactured by Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-448-4645?

NSN 4820-01-448-4645 has 4 cross-referenced part numbers: KC49679-1 (Circor Aerospace, Inc. Dba Circor Aerospace Inc), KC49679-1 (Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division), 4004-9 (Aerospace Systems and Components, Inc.), KC49679 (Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division).

What NSN replaces 4820-01-448-4645?

There are 12 known substitutes for 4820-01-448-4645: 5310-00-010-3320, 2810-00-118-9444, 6660-00-670-4850 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of KC49679?

Key specifications for KC49679: Valve Operation Method: AUTOMATIC; Maximum Operating Temp: 840.0 FAHRENHEIT SINGLE RESPONSE DEGF; Operating Pressure: 36.5 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Minimum Operating Temp: -65.0 FAHRENHEIT DEGF. 10 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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