PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AP-2Valve,regulating,fluid Pressure

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-435-4258 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-435-4258 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-435-4258. Primary manufacturer part number: AP-2.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • Material: RUBBER SYNTHETIC FLOW CONTROL DEVICE
  • Body Style: STRAIGHT THRU
  • Maximum Inlet Pressure Rating: ERR-060
  • Manual Control Method: SCREW
  • Temp Rating: 150.0 FAHRENHEIT MAXIMUM DEGF
  • Flow Control Device: DIAPHRAGM
  • Regulation Type: AUTOMATIC SINGLE STAGE
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Rubber Synthetic Flow Control Device construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-435-4258, 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 16 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-435-4258
Primary Part NumberAP-2
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
MaterialRUBBER SYNTHETIC FLOW CONTROL DEVICE
Body StyleSTRAIGHT THRU
Maximum Inlet Pressure RatingERR-060
Manual Control MethodSCREW
Temp Rating150.0 FAHRENHEIT MAXIMUM DEGF
Flow Control DeviceDIAPHRAGM
Regulation TypeAUTOMATIC SINGLE STAGE
End Connection Quantity2
Valve Loading MethodSPRING
MaterialALUMINUM AND BRONZE SEAT
FilterINCLUDED
First End Style DesignatorPLAIN
First End Connection TypeUNTHREADED INTERNAL TUBE
First End Outside Diameter Tube Accommodated0.250 INCHES NOMINAL IN
Second End Relationship with First EndIDENTICAL
MaterialSTEEL STEM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4820-00-128-9797 INTERCHANGEABLE
Valve,saddle
6625-00-171-8985114300-6 INTERCHANGEABLE
Ammeter
Lockheed Martin Corp Electronics and Missiles Div
6930-00-514-0271 INTERCHANGEABLE
Trainer,radio Procedure,navigati
4320-00-653-0026AP2 INTERCHANGEABLE
Cylinder Sleeve
Circor Naval Solutions Llc Dba Warren Pumps
5340-00-727-0820483649-3 INTERCHANGEABLE
Clamp,loop
Raytheon Company Dba Raytheon Co
5340-01-019-2080WC-54 INTERCHANGEABLE
Clamp,loop
Brady United States
5340-01-119-4170ADJ-P-CLIP-SIZE-2 INTERCHANGEABLE
Clamp,loop
Electrovert Usa Corp
6640-01-658-6608AP 2 INTERCHANGEABLE
Tip,pipet
Axygen, Inc. Dba Axygen Scientific
Cross-Reference Index
Part NumberManufacturer
1/4IN CLASS AP-2 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
AP-2 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
4820-00-128-9797INTERCHANGEABLE
VALVE,SADDLE
6625-00-171-8985INTERCHANGEABLE
AMMETER
114300-6
6930-00-514-0271INTERCHANGEABLE
TRAINER,RADIO PROCEDURE,NAVIGATI
4320-00-653-0026INTERCHANGEABLE
CYLINDER SLEEVE
AP2
5340-00-727-0820INTERCHANGEABLE
CLAMP,LOOP
483649-3
5340-01-019-2080INTERCHANGEABLE
CLAMP,LOOP
WC-54
5340-01-119-4170INTERCHANGEABLE
CLAMP,LOOP
ADJ-P-CLIP-SIZE-2
6640-01-658-6608INTERCHANGEABLE
TIP,PIPET
AP 2

Frequently Asked Questions

What is NSN 4820-01-435-4258?

NSN 4820-01-435-4258 is a Valve,regulating,fluid Pressure, 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 4820-01-435-4258?

NSN 4820-01-435-4258 has 2 cross-referenced part numbers: 1/4IN CLASS AP-2 (Leslie Controls, Inc. Dba Leslie Controls Inc), AP-2 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-435-4258?

There are 8 known substitutes for 4820-01-435-4258: 4820-00-128-9797, 6625-00-171-8985, 6930-00-514-0271 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AP-2?

Key specifications for AP-2: Material: RUBBER SYNTHETIC FLOW CONTROL DEVICE; Body Style: STRAIGHT THRU; Maximum Inlet Pressure Rating: ERR-060; Manual Control Method: SCREW. 17 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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