PartsTable TECHNICAL DATA SHEET

JULY 2026Technical Data Sheet

31816Diaphragm,valve,flat

Name: 31816
SKU: 4820-01-011-8160

Circor Aerospace, Inc. Dba Circor Aerospace Inc · NSN 4820-01-011-8160 · FSC 4820 · No Item Name Available

Verified by PartsTable

NSN 4820-01-011-8160 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-011-8160. Primary manufacturer part number: 31816.

4820-01-011-8160 — No Item Name Available illustration

Features

Diaphragm,valve,flat — FSC 4820
Material: RUBBER SYNTHETIC
Material Thickness: 0.031 INCHES NOMINAL IN
Outside Diameter: 1.734 INCHES NOMINAL IN
Style Designator: FLAT
2 verified cross-references
Primary manufacturer: Circor Aerospace, Inc. Dba Circor Aerospace Inc

Applications

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

General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-011-8160, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Aerospace, Inc. Dba Circor Aerospace Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-011-8160
Primary Part Number	31816
Item Name	Diaphragm,valve,flat
FSC / FSG	4820 / 48 — No Item Name Available
Manufacturer	Circor Aerospace, Inc. Dba Circor Aerospace Inc
Status	ACTIVE
Material	RUBBER SYNTHETIC
Material Thickness	0.031 INCHES NOMINAL IN
Outside Diameter	1.734 INCHES NOMINAL IN
Style Designator	FLAT

Lifecycle & Compliance

Acquisition Status	ACTIVE
HAZMAT	No

⇄ Verified Substitutes 9

5315-00-058-9727MS16562-209 INTERCHANGEABLE

Pin,spring

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

3455-00-268-950759-10090 INTERCHANGEABLE

Cutter,milling,screw Slotting

Union Butterfield Corp P O Box 9000 Crystal Lake Il 60039

2825-00-389-8650T70015A05 INTERCHANGEABLE

Slide Assembly

Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture

1680-00-783-577431816 INTERCHANGEABLE

Parts Kit,screwjack

Beaver Aerospace & Defense, Inc.

5305-01-103-5454 INTERCHANGEABLE

Setscrew

4320-01-122-519831816 INTERCHANGEABLE

Impeller,pump,centrifugal

Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.

6645-01-263-227631816 INTERCHANGEABLE

Timer,interval

Hrs Corporation

4320-01-317-069231816 INTERCHANGEABLE

Pump,rotary

Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems

4730-01-441-6496W2T90484 INTERCHANGEABLE

Packing Nut

Evoqua Water Technologies Llc

Cross-Reference Index

Part Number	Manufacturer
P40-433PC44	Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)
31816 PRIMARY	Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)

Related Parts

5315-00-058-9727INTERCHANGEABLE

PIN,SPRING

MS16562-209

3455-00-268-9507INTERCHANGEABLE

CUTTER,MILLING,SCREW SLOTTING

59-10090

2825-00-389-8650INTERCHANGEABLE

SLIDE ASSEMBLY

T70015A05

1680-00-783-5774INTERCHANGEABLE

PARTS KIT,SCREWJACK

31816

5305-01-103-5454INTERCHANGEABLE

SETSCREW

4320-01-122-5198INTERCHANGEABLE

IMPELLER,PUMP,CENTRIFUGAL

31816

6645-01-263-2276INTERCHANGEABLE

TIMER,INTERVAL

31816

4320-01-317-0692INTERCHANGEABLE

PUMP,ROTARY

31816

4730-01-441-6496INTERCHANGEABLE

PACKING NUT

W2T90484

Frequently Asked Questions

What is NSN 4820-01-011-8160?

NSN 4820-01-011-8160 is a Diaphragm,valve,flat, manufactured by Circor Aerospace, Inc. Dba Circor Aerospace Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-011-8160?

NSN 4820-01-011-8160 has 2 cross-referenced part numbers: P40-433PC44 (Circor Aerospace, Inc. Dba Circor Aerospace Inc), 31816 (Circor Aerospace, Inc. Dba Circor Aerospace Inc).

What NSN replaces 4820-01-011-8160?

There are 9 known substitutes for 4820-01-011-8160: 5315-00-058-9727, 3455-00-268-9507, 2825-00-389-8650 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31816?

Key specifications for 31816: Material: RUBBER SYNTHETIC; Material Thickness: 0.031 INCHES NOMINAL IN; Outside Diameter: 1.734 INCHES NOMINAL IN; Style Designator: FLAT. 4 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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