NSN 4820-01-177-8504 · NIIN 011778504 · Part number 7878 ITEM 3-6IN
William E Williams Valve Corp · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 79342
Government record, cited
NSN 4820-01-177-8504 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-177-8504. Manufacturer of record part number: 7878 ITEM 3-6IN.
Thread Length: 0.781 INCHES NOMINAL SINGLE THREADED PORTION IN
Style Designator: PLAIN THREADED
Body Inside Diameter: 5.925 INCHES NOMINAL IN
Nominal Thread Size: 6.750 INCHES SINGLE THREADED PORTION IN
Thread Class: 2A SINGLE THREADED PORTION A
Thread Quantity Per Inch: 12 SINGLE THREADED PORTION
Material: STEEL OVERALL
Identification
NSN: 4820-01-177-8504
NIIN: 011778504
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 7878 ITEM 3-6IN
Manufacturer: William E Williams Valve Corp
General Description
The Seat,valve, cataloged under National Stock Number 4820-01-177-8504, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is William E Williams Valve Corp. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-177-8504?
NSN 4820-01-177-8504 is a Seat,valve, manufactured by William E Williams Valve Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-177-8504?
NSN 4820-01-177-8504 has 1 manufacturer part number on file: 7878 ITEM 3-6IN (William E Williams Valve Corp).
What are the specifications of 7878 ITEM 3-6IN?
Key specifications for 7878 ITEM 3-6IN: Overall Height: 0.850 INCHES NOMINAL IN; Thread Length: 0.781 INCHES NOMINAL SINGLE THREADED PORTION IN; Style Designator: PLAIN THREADED; Body Inside Diameter: 5.925 INCHES NOMINAL IN. 9 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-177-8504 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.