Operating Nut4820-01-088-5550

NSN 4820-01-088-5550 · NIIN 010885550

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-088-5550 · 4820010885550 · NIIN 010885550 · 01-088-5550 · FSC 4820 Valves, Nonpowered · 803-2177917-5-43 · 803-2177917

Nearby stock numbers ← 4820-01-088-5548 Valve Stem, Pneumatic Tank · 4820-01-088-5551 →

4820-01-088-5550 — Valves, Nonpowered

Features

Operating Nut — FSC 4820
General Characteristics Item Description: MATERIAL BRONZE MANGANESE PER ASTM B147 ALLOY 8A; LENGTH 3.281 IN.; FLANGED; FLANGE DIA 2.312 IN.; FLANGE THICKNESS 0.375 IN.; MAJOR DIA 1.891 IN.; EXTERNALLY THREADED; NS 1.374-14 3A FIT; THREAD LENGTH 0.875 IN.; INTERNALLY THREADED; ACME 1.000-5 3G FIT; LEFT HAND; THREAD LENGTH 2.375 IN. A

Identification

NSN: 4820-01-088-5550
NIIN: 010885550
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Operating Nut, cataloged under National Stock Number 4820-01-088-5550, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-088-5550
Item Name	Operating Nut
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
General Characteristics Item Description	MATERIAL BRONZE MANGANESE PER ASTM B147 ALLOY 8A; LENGTH 3.281 IN.; FLANGED; FLANGE DIA 2.312 IN.; FLANGE THICKNESS 0.375 IN.; MAJOR DIA 1.891 IN.; EXTERNALLY THREADED; NS 1.374-14 3A FIT; THREAD LENGTH 0.875 IN.; INTERNALLY THREADED; ACME 1.000-5 3G FIT; LEFT HAND; THREAD LENGTH 2.375 IN. A

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

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
803-2177917-5-43	3/2 Design control — primary reference U.S. Government activity
803-2177917	D/9 Drawing number reference only U.S. Government activity

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 4820-01-088-5550?

NSN 4820-01-088-5550 is a Operating Nut, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-01-088-5550?

Key specifications for 4820-01-088-5550: General Characteristics Item Description: MATERIAL BRONZE MANGANESE PER ASTM B147 ALLOY 8A; LENGTH 3.281 IN.; FLANGED; FLANGE DIA 2.312 IN.; FLANGE THICKNESS 0.375 IN.; MAJOR DIA 1.891 IN.; EXTERNALLY THREADED; NS 1.374-14 3A FIT; THREAD LENGTH 0.875 IN.; INTERNALLY THREADED; ACME 1.000-5 3G FIT; LEFT HAND; THREAD LENGTH 2.375 IN. A. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-088-5550 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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