PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SS-4P-6MValve,bleeder,hydraulic System

Swagelok Co · NSN 4820-01-258-2161 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-258-2161 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-258-2161. Primary manufacturer part number: SS-4P-6M.
Features
  • Valve,bleeder,hydraulic System — FSC 4820
  • Style Designator: STRAIGHT THRU
  • Thread Series Designator: NPT ALL ENDS
  • Material: STEEL CORROSION RESISTING BODY
  • Valve Operation Method: MANUAL
  • Nominal Thread Size: 0.375 INCHES ALL ENDS IN
  • Connection Style: PLAIN (PIPE) ALL ENDS
  • Connection Type: THREADED EXTERNAL PIPE ALL ENDS
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Body construction
General Description

The Valve,bleeder,hydraulic System, cataloged under National Stock Number 4820-01-258-2161, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Swagelok Co. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 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
NSN4820-01-258-2161
Primary Part NumberSS-4P-6M
Item NameValve,bleeder,hydraulic System
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSwagelok Co
StatusACTIVE
Style DesignatorSTRAIGHT THRU
Thread Series DesignatorNPT ALL ENDS
MaterialSTEEL CORROSION RESISTING BODY
Valve Operation MethodMANUAL
Nominal Thread Size0.375 INCHES ALL ENDS IN
Connection StylePLAIN (PIPE) ALL ENDS
Connection TypeTHREADED EXTERNAL PIPE ALL ENDS
Thread DirectionRIGHT-HAND ALL ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5305-00-054-5636 INTERCHANGEABLE
Screw,machine
5330-00-066-220623001 INTERCHANGEABLE
Packing,preformed
Curtiss-Wright Electro-Mechanical Corporation Div Epd
5355-00-160-6096SCB105817 INTERCHANGEABLE
Knob
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6850-00-281-183723001 INTERCHANGEABLE
Desiccant,activated
W.a. Hammond Drierite Co, Limited
5961-00-436-3948 INTERCHANGEABLE
Semiconductor Device,diode
6645-00-535-4374300519 INTERCHANGEABLE
Plate Assy,pillar
Waltham Aircraft Clock Corp
5935-00-552-7660REB49028 INTERCHANGEABLE
Connector,receptacle,electrical
Naval Ship Systems Command
5945-01-008-4674230-01 INTERCHANGEABLE
Relay,electromagnetic
Hose-Mccann Telephone Co, Inc
5962-01-124-347423001 INTERCHANGEABLE
Microcircuit
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
6695-01-216-87762300-1 INTERCHANGEABLE
Transducer,motional Pickup
Phaostron Instrument and Electronic Company
Cross-Reference Index
Part NumberManufacturer
2300 Greno Industries, Inc. Dba Greno Industries Inc (USA)
2300 1 Greno Industries, Inc. Dba Greno Industries Inc (USA)
SS-4P-6M PRIMARY Swagelok Co (USA)
2490 Greno Industries, Inc. Dba Greno Industries Inc (USA)
SS-4P-6M Nupro Co (USA)
SS4P6M Greno Industries, Inc. Dba Greno Industries Inc (USA)
Related Parts
5305-00-054-5636INTERCHANGEABLE
SCREW,MACHINE
5330-00-066-2206INTERCHANGEABLE
PACKING,PREFORMED
23001
5355-00-160-6096INTERCHANGEABLE
KNOB
SCB105817
6850-00-281-1837INTERCHANGEABLE
DESICCANT,ACTIVATED
23001
5961-00-436-3948INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
6645-00-535-4374INTERCHANGEABLE
PLATE ASSY,PILLAR
300519
5935-00-552-7660INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
REB49028
5945-01-008-4674INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
230-01
5962-01-124-3474INTERCHANGEABLE
MICROCIRCUIT
23001
6695-01-216-8776INTERCHANGEABLE
TRANSDUCER,MOTIONAL PICKUP
2300-1
6525-01-324-6975INTERCHANGEABLE
FILM,RADIOGRAPHIC
1588342
6625-01-430-3607INTERCHANGEABLE
GENERATOR,FUNCTION,ELECTRONIC TE
23-001

Frequently Asked Questions

What is NSN 4820-01-258-2161?

NSN 4820-01-258-2161 is a Valve,bleeder,hydraulic System, manufactured by Swagelok Co, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-258-2161?

NSN 4820-01-258-2161 has 6 cross-referenced part numbers: 2300 (Greno Industries, Inc. Dba Greno Industries Inc), 2300 1 (Greno Industries, Inc. Dba Greno Industries Inc), SS-4P-6M (Swagelok Co), 2490 (Greno Industries, Inc. Dba Greno Industries Inc), SS-4P-6M (Nupro Co) and 1 more.

What NSN replaces 4820-01-258-2161?

There are 12 known substitutes for 4820-01-258-2161: 5305-00-054-5636, 5330-00-066-2206, 5355-00-160-6096 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SS-4P-6M?

Key specifications for SS-4P-6M: Style Designator: STRAIGHT THRU; Thread Series Designator: NPT ALL ENDS; Material: STEEL CORROSION RESISTING BODY; Valve Operation Method: MANUAL. 8 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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