PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21-1136TT-0 1INValve,ball

Portland Valve Llc · NSN 4820-01-321-3655 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-321-3655 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-321-3655. Primary manufacturer part number: 21-1136TT-0 1IN.
Features
  • Valve,ball — FSC 4820
  • Operating Pressure: 800.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Valve Operation Method: MANUAL
  • Material: STEEL CORROSION RESISTING BODY
  • Furnished Items and Quantity: 1 HANDLE
  • Connection Style: SOCKET ALL ENDS
  • Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS
  • Nominal Pipe Size Accommodated: 1.000 INCHES ALL ENDS IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Body construction
General Description

The Valve,ball, cataloged under National Stock Number 4820-01-321-3655, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Portland Valve Llc. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-321-3655
Primary Part Number21-1136TT-0 1IN
Item NameValve,ball
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerPortland Valve Llc
StatusACTIVE
Operating Pressure800.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Valve Operation MethodMANUAL
MaterialSTEEL CORROSION RESISTING BODY
Furnished Items and Quantity1 HANDLE
Connection StyleSOCKET ALL ENDS
Connection TypeUNTHREADED INTERNAL PIPE ALL ENDS
Nominal Pipe Size Accommodated1.000 INCHES ALL ENDS IN
Media for Which DesignedLIQUID SINGLE RESPONSE
Style DesignatorSTRAIGHT THRU
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
6145-00-163-7493293-3922 INTERCHANGEABLE
Cable,radio Frequency
Te Connectivity Corporation Dba Microdot Products
9905-00-202-36390100A INTERCHANGEABLE
Reflector,indicating,clearance
Grote Industries Inc Dba Grote Manufacturing Co Div Military Products
6810-00-234-8362 INTERCHANGEABLE
Barium Hydroxide,octahydrate
6810-00-299-8499 INTERCHANGEABLE
Barium Hydroxide,octahydrate
5930-00-327-73083772 INTERCHANGEABLE
Switch,push
Telephone Company of America Incorporated
5305-00-543-5763 INTERCHANGEABLE
Screw,machine
6680-01-066-32543772 INTERCHANGEABLE
Transmitter,rate of Flow
Knight Aerospace Products, Inc.
5985-01-110-10513772 INTERCHANGEABLE
Antenna
Te Connectivity Corporation
6515-01-476-4019 INTERCHANGEABLE
Support,ankle
6515-01-515-47663772 INTERCHANGEABLE
Retractor,swivel
Minnesota Scientific Inc. Dba Omni-Tract Surgical
Cross-Reference Index
Part NumberManufacturer
21-1136TT-0 1IN PRIMARY Portland Valve Llc (USA)
3772 Portland Valve Llc (USA)
Related Parts
6145-00-163-7493INTERCHANGEABLE
CABLE,RADIO FREQUENCY
293-3922
9905-00-202-3639INTERCHANGEABLE
REFLECTOR,INDICATING,CLEARANCE
0100A
6810-00-234-8362INTERCHANGEABLE
BARIUM HYDROXIDE,OCTAHYDRATE
6810-00-299-8499INTERCHANGEABLE
BARIUM HYDROXIDE,OCTAHYDRATE
5930-00-327-7308INTERCHANGEABLE
SWITCH,PUSH
3772
5305-00-543-5763INTERCHANGEABLE
SCREW,MACHINE
6680-01-066-3254INTERCHANGEABLE
TRANSMITTER,RATE OF FLOW
3772
5985-01-110-1051INTERCHANGEABLE
ANTENNA
3772
6515-01-476-4019INTERCHANGEABLE
SUPPORT,ANKLE
6515-01-515-4766INTERCHANGEABLE
RETRACTOR,SWIVEL
3772

Frequently Asked Questions

What is NSN 4820-01-321-3655?

NSN 4820-01-321-3655 is a Valve,ball, manufactured by Portland Valve Llc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-321-3655?

NSN 4820-01-321-3655 has 2 cross-referenced part numbers: 21-1136TT-0 1IN (Portland Valve Llc), 3772 (Portland Valve Llc).

What NSN replaces 4820-01-321-3655?

There are 10 known substitutes for 4820-01-321-3655: 6145-00-163-7493, 9905-00-202-3639, 6810-00-234-8362 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21-1136TT-0 1IN?

Key specifications for 21-1136TT-0 1IN: Operating Pressure: 800.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Valve Operation Method: MANUAL; Material: STEEL CORROSION RESISTING BODY; Furnished Items and Quantity: 1 HANDLE. 9 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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