PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

35055Cover,valve

Williams International Co., L.l.c. · NSN 4820-01-025-8505 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-025-8505 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-025-8505. Primary manufacturer part number: 35055.
Features
  • Cover,valve — FSC 4820
  • General Characteristics Item Description: ALUMINUM ALLOY,4.500 IN. DIA FLANGE,0.130 IN. THK,8 BOLT HOLES EQUALLY SPACED ON 4.000 IN. CIRCLE 0.750 IN. H FROM TOP OF FLANGE TO TOP OF COVER 3.750 IN. TOP DIA W/INTERNALLY THD HOLE ON SIDE 0.125-27 NPT THD SIZE IN
  • 1 verified cross-reference
  • Primary manufacturer: Williams International Co., L.l.c.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Cover,valve, cataloged under National Stock Number 4820-01-025-8505, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Williams International Co., L.l.c.. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-025-8505
Primary Part Number35055
Item NameCover,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWilliams International Co., L.l.c.
StatusACTIVE
General Characteristics Item DescriptionALUMINUM ALLOY,4.500 IN. DIA FLANGE,0.130 IN. THK,8 BOLT HOLES EQUALLY SPACED ON 4.000 IN. CIRCLE 0.750 IN. H FROM TOP OF FLANGE TO TOP OF COVER 3.750 IN. TOP DIA W/INTERNALLY THD HOLE ON SIDE 0.125-27 NPT THD SIZE IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5310-00-185-0098268016PC4 INTERCHANGEABLE
Washer,flat
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
4810-00-528-366635-055 INTERCHANGEABLE
Valve,solenoid
Hydro-Aire Aerospace Corp
3040-01-030-0979SR11218A INTERCHANGEABLE
Connecting Link,rigid
Sps Technologies Llc Dba Shur-Lok Company Div Aerospace Engineered Products Division
6105-01-107-06173505-5 INTERCHANGEABLE
Motor,alternating Current
Electric Boat Corporation Div General Dynamics Electric Boat
4720-01-336-815425055 INTERCHANGEABLE
Hose,nonmetallic
Griffith Rubber Mills
6515-01-557-69379055 INTERCHANGEABLE
Needle,intraosseous Device Set
Teleflex Llc
7025-01-609-107835055 INTERCHANGEABLE
Disk Drive Unit
Iomega Corporation
Cross-Reference Index
Part NumberManufacturer
35055 PRIMARY Williams International Co., L.l.c. (USA)
Related Parts
5310-00-185-0098INTERCHANGEABLE
WASHER,FLAT
268016PC4
4810-00-528-3666INTERCHANGEABLE
VALVE,SOLENOID
35-055
3040-01-030-0979INTERCHANGEABLE
CONNECTING LINK,RIGID
SR11218A
6105-01-107-0617INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
3505-5
4720-01-336-8154INTERCHANGEABLE
HOSE,NONMETALLIC
25055
6515-01-557-6937INTERCHANGEABLE
NEEDLE,INTRAOSSEOUS DEVICE SET
9055
7025-01-609-1078INTERCHANGEABLE
DISK DRIVE UNIT
35055

Frequently Asked Questions

What is NSN 4820-01-025-8505?

NSN 4820-01-025-8505 is a Cover,valve, manufactured by Williams International Co., L.l.c., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-025-8505?

NSN 4820-01-025-8505 has 1 cross-referenced part number: 35055 (Williams International Co., L.l.c.).

What NSN replaces 4820-01-025-8505?

There are 7 known substitutes for 4820-01-025-8505: 5310-00-185-0098, 4810-00-528-3666, 3040-01-030-0979 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 35055?

Key specifications for 35055: End Item Identification: AIRCRAFT MODEL S-3A A; General Characteristics Item Description: ALUMINUM ALLOY,4.500 IN. DIA FLANGE,0.130 IN. THK,8 BOLT HOLES EQUALLY SPACED ON 4.000 IN. CIRCLE 0.750 IN. H FROM TOP OF FLANGE TO TOP OF COVER 3.750 IN. TOP DIA W/INTERNALLY THD HOLE ON SIDE 0.125-27 NPT THD SIZE IN. 2 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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