PartsTable TECHNICAL DATA SHEET

JULY 2026Technical Data Sheet

3280Diaphragm,valve,flat

Name: 3280
SKU: 4820-00-911-1520

Singer Valve Inc · NSN 4820-00-911-1520 · FSC 4820 · No Item Name Available

Verified by PartsTable

NSN 4820-00-911-1520 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-911-1520. Primary manufacturer part number: 3280.

4820-00-911-1520 — No Item Name Available illustration

Features

Diaphragm,valve,flat — FSC 4820
Bolt Hole Quantity: 16
Center Hole Diameter: 0.338 INCHES NOMINAL IN
Material: PLASTIC AND RUBBER SYNTHETIC
Style Designator: FLAT
Bolt Circle Diameter: 10.000 INCHES NOMINAL IN
Hole Diameter: 0.345 INCHES NOMINAL IN
Material Thickness: 0.068 INCHES NOMINAL IN

Applications

Flow control in piping systems
Pressure regulation
Steam and fluid isolation
Applications requiring Plastic and Rubber Synthetic construction

General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-911-1520, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Singer Valve Inc. Government technical data includes 8 verified specifications, 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-00-911-1520
Primary Part Number	3280
Item Name	Diaphragm,valve,flat
FSC / FSG	4820 / 48 — No Item Name Available
Manufacturer	Singer Valve Inc
Status	ACTIVE
Bolt Hole Quantity	16
Center Hole Diameter	0.338 INCHES NOMINAL IN
Material	PLASTIC AND RUBBER SYNTHETIC
Style Designator	FLAT
Bolt Circle Diameter	10.000 INCHES NOMINAL IN
Hole Diameter	0.345 INCHES NOMINAL IN
Material Thickness	0.068 INCHES NOMINAL IN
Outside Diameter	11.000 INCHES NOMINAL IN

Lifecycle & Compliance

Acquisition Status	ACTIVE
HAZMAT	No

⇄ Verified Substitutes 11

1385-00-025-0759795578PC1 INTERCHANGEABLE

Dearmer Assembly

Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier

4330-00-088-2056K-25001 INTERCHANGEABLE

Filter Element,fluid

Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division

5930-00-239-310053-23 INTERCHANGEABLE

Switch,toggle

Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems

3030-00-528-4281 INTERCHANGEABLE

Belt,v

3030-00-528-4559 INTERCHANGEABLE

Belt,v

6515-01-325-3713003280 INTERCHANGEABLE

Manifold Assembly,inhalation the

H. D. Smith Wholesale Drug Co. Dba Smith Medical Partners Div Smith Medical Partners

3020-01-369-9200 INTERCHANGEABLE

Gear,spur

6510-01-428-23163280 INTERCHANGEABLE

Dressing,hydrocolloid

Coloplast Corp

4820-01-445-3651 INTERCHANGEABLE

Seat,valve

1560-01-508-40903280 INTERCHANGEABLE

Assembly,verticle Fin

Summit Radio Corp Dba Summit Aviation Supply Co

Cross-Reference Index

Part Number	Manufacturer
3280 PRIMARY	Singer Valve Inc (CAN)

Related Parts

1385-00-025-0759INTERCHANGEABLE

DEARMER ASSEMBLY

795578PC1

4330-00-088-2056INTERCHANGEABLE

FILTER ELEMENT,FLUID

K-25001

5930-00-239-3100INTERCHANGEABLE

SWITCH,TOGGLE

53-23

3030-00-528-4281INTERCHANGEABLE

BELT,V

3030-00-528-4559INTERCHANGEABLE

BELT,V

6515-01-325-3713INTERCHANGEABLE

MANIFOLD ASSEMBLY,INHALATION THE

003280

3020-01-369-9200INTERCHANGEABLE

GEAR,SPUR

6510-01-428-2316INTERCHANGEABLE

DRESSING,HYDROCOLLOID

3280

4820-01-445-3651INTERCHANGEABLE

SEAT,VALVE

1560-01-508-4090INTERCHANGEABLE

ASSEMBLY,VERTICLE FIN

3280

5325-01-614-7332INTERCHANGEABLE

FASTENER TAPE,HOOK AND PILE

3280

Frequently Asked Questions

What is NSN 4820-00-911-1520?

NSN 4820-00-911-1520 is a Diaphragm,valve,flat, manufactured by Singer Valve Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-911-1520?

NSN 4820-00-911-1520 has 1 cross-referenced part number: 3280 (Singer Valve Inc).

What NSN replaces 4820-00-911-1520?

There are 11 known substitutes for 4820-00-911-1520: 1385-00-025-0759, 4330-00-088-2056, 5930-00-239-3100 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3280?

Key specifications for 3280: Bolt Hole Quantity: 16; Center Hole Diameter: 0.338 INCHES NOMINAL IN; Material: PLASTIC AND RUBBER SYNTHETIC; Style Designator: FLAT. 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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