NSN 4820-01-065-1779 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-065-1779. Manufacturer of record part number: AF531.
Also searched as4820-01-065-1779 ·
4820010651779 ·
NIIN 010651779 ·
01-065-1779 ·
FSC 4820 Valves, Nonpowered · CAGE 24123 · AF531
Nearby stock numbers← 4820-01-065-1769 Parts Kit, Valve
·
4820-01-065-1780 Sleeve and Slide, Directional Con →
4820-01-065-1779 — Valves, Nonpowered
Features
Diaphragm,valve,flat — FSC 4820
Style Designator: FLAT
Material Thickness: 0.008 INCHES NOMINAL IN
Bolt Hole Quantity: 4
Center to Center Distance Between Bolt Holes Along Length: 1.875 INCHES NOMINAL IN
Center to Center Distance Between Bolt Holes Along Width: 1.875 INCHES NOMINAL IN
Material: STEEL CORROSION RESISTING
Hole Diameter: 0.272 INCHES NOMINAL IN
Identification
NSN: 4820-01-065-1779
NIIN: 010651779
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: AF531
Manufacturer: Gast Mfg Corp
General Description
The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-065-1779, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Gast Mfg Corp. Government technical data includes 7 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.
Technical Specifications
Parameter
Value
NSN
4820-01-065-1779
Primary Part Number
AF531
Item Name
Diaphragm,valve,flat
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Gast Mfg Corp
Status
ACTIVE
Style Designator
FLAT
Material Thickness
0.008 INCHES NOMINAL IN
Bolt Hole Quantity
4
Center to Center Distance Between Bolt Holes Along Length
1.875 INCHES NOMINAL IN
Center to Center Distance Between Bolt Holes Along Width
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 4820-01-065-1779?
NSN 4820-01-065-1779 is a Diaphragm,valve,flat, manufactured by Gast Mfg Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-065-1779?
NSN 4820-01-065-1779 has 1 manufacturer part number on file: AF531 (Gast Mfg Corp).
What are the specifications of AF531?
Key specifications for AF531: Style Designator: FLAT; Overall Length: 2.812 INCHES NOMINAL IN; Overall Width: 2.812 INCHES NOMINAL IN; Material Thickness: 0.008 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-065-1779 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.