PartsTable TECHNICAL DATA SHEET

NSN 4820-01-375-2138Government record, cited

Flexible Element4820-01-375-2138

NSN 4820-01-375-2138 · NIIN 013752138 · Part number ND3956

Oil States Industries, Inc. Div Special Products Div · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 18444

Government record, cited

NSN 4820-01-375-2138 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-375-2138. Manufacturer of record part number: ND3956.

Also searched as 4820-01-375-2138 · 4820013752138 · NIIN 013752138 · 01-375-2138 · FSC 4820 Valves, Nonpowered · CAGE 18444 · ND3956 · ND3955ITEM6

Nearby stock numbers ← 4820-01-375-2125 Cartridge, Valve · 4820-01-375-2350 Valve, Flow Control →

4820-01-375-2138 — Valves, Nonpowered

Features

Flexible Element — FSC 4820
General Characteristics Item Description: STEAM PRESSURE 33PSI; ELASTOMER MATERIAL
2 manufacturer part numbers on file
Manufacturer of record: Oil States Industries, Inc. Div Special Products Div

Identification

NSN: 4820-01-375-2138
NIIN: 013752138
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: ND3956
Manufacturer: Oil States Industries, Inc. Div Special Products Div

General Description

The Flexible Element, cataloged under National Stock Number 4820-01-375-2138, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Oil States Industries, Inc. Div Special Products Div. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-375-2138
Primary Part Number	ND3956
Item Name	Flexible Element
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Oil States Industries, Inc. Div Special Products Div
Status	ACTIVE
General Characteristics Item Description	STEAM PRESSURE 33PSI; ELASTOMER MATERIAL

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
ND3956 PRIMARY	Oil States Industries, Inc. Div Special Products Div (USA)
ND3955ITEM6	Oil States Industries, Inc. Div Special Products Div (USA)

No interchangeability data on file.

Other items in FSC 4820 — Valves, Nonpowered

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 4820-01-375-2138?

NSN 4820-01-375-2138 is a Flexible Element, manufactured by Oil States Industries, Inc. Div Special Products Div, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-375-2138?

NSN 4820-01-375-2138 has 2 manufacturer part numbers on file: ND3956 (Oil States Industries, Inc. Div Special Products Div), ND3955ITEM6 (Oil States Industries, Inc. Div Special Products Div).

What are the specifications of ND3956?

Key specifications for ND3956: General Characteristics Item Description: STEAM PRESSURE 33PSI; ELASTOMER MATERIAL. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-375-2138 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.

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