PartsTable TECHNICAL DATA SHEET

NSN 4820-01-103-3331Government record, cited

Retainer, Dowel4820-01-103-3331

NSN 4820-01-103-3331 · NIIN 011033331

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-103-3331 · 4820011033331 · NIIN 011033331 · 01-103-3331 · FSC 4820 Valves, Nonpowered · 803-4385049 · 810-4385049 · 803-4385049-X-034 · 810-4385049-B-0 · 810-4385049-X-034

Nearby stock numbers ← 4820-01-103-3330 Cap, Connecting Rod · 4820-01-103-3334 Stem, Fluid Valve →

4820-01-103-3331 — Valves, Nonpowered

Features

Retainer,dowel — FSC 4820
General Characteristics Item Description: STEEL,AISI-C-1018; 3.125 IN. O/A LG,0.750 IN. OD SHAFT,1.250 IN. LG HEAD,EXTERNALLY THD,1-1/4 IN. 7 UNC-2A THD SIZE,1.250 IN. THD LG,WITH INTERNAL HEX SOCKET,0.500 IN. W ACROSS FLATS,0.625 IN. DEEP A

Identification

NSN: 4820-01-103-3331
NIIN: 011033331
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Retainer,dowel, cataloged under National Stock Number 4820-01-103-3331, 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1 specification, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-103-3331
Item Name	Retainer,dowel
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
General Characteristics Item Description	STEEL,AISI-C-1018; 3.125 IN. O/A LG,0.750 IN. OD SHAFT,1.250 IN. LG HEAD,EXTERNALLY THD,1-1/4 IN. 7 UNC-2A THD SIZE,1.250 IN. THD LG,WITH INTERNAL HEX SOCKET,0.500 IN. W ACROSS FLATS,0.625 IN. DEEP 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

⇄ Related Items 6

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

4820-01-103-3385810-4385049-X-012 POSSIBLE MATCH

CAP,VALVE

Possible match (shared part number)Naval Ship Systems Command

4820-01-103-3436810-4385049-X-037 POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Naval Ship Systems Command

4820-01-111-5698803-4385049-X-095 POSSIBLE MATCH

RETAINER,DOWEL

Possible match (shared part number)Naval Ship Systems Command

4810-01-113-3738810-4385049-B-054 POSSIBLE MATCH

CRANKSHAFT,VALVE

Possible match (shared part number)Naval Ship Systems Command

4810-01-113-4202810-4385049-B-020 POSSIBLE MATCH

LINK,ADJUSTING

Possible match (shared part number)Naval Ship Systems Command

4810-01-113-5381810-4385049-X-048 POSSIBLE MATCH

STEM,FLUID VALVE

Possible match (shared part number)Naval Ship Systems Command

Cross-Reference Index

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

Reference documents

Reference	Meaning
803-4385049	D/9 Drawing number reference only U.S. Government activity
810-4385049	5/9 Secondary reference U.S. Government activity
803-4385049-X-034	3/2 Design control — primary reference U.S. Government activity
810-4385049-B-0	C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity
810-4385049-X-034	5/9 Secondary reference U.S. Government activity
810-4385049 PIECE 34	5/9 Secondary reference U.S. Government activity

Related Parts

4820-01-103-3385POSSIBLE MATCH

CAP,VALVE

810-4385049-X-012

4820-01-103-3436POSSIBLE MATCH

DISK,VALVE

810-4385049-X-037

4820-01-111-5698POSSIBLE MATCH

RETAINER,DOWEL

803-4385049-X-095

4810-01-113-3738POSSIBLE MATCH

CRANKSHAFT,VALVE

810-4385049-B-054

4810-01-113-4202POSSIBLE MATCH

LINK,ADJUSTING

810-4385049-B-020

4810-01-113-5381POSSIBLE MATCH

STEM,FLUID VALVE

810-4385049-X-048

Frequently Asked Questions

What is NSN 4820-01-103-3331?

NSN 4820-01-103-3331 is a Retainer,dowel, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-103-3331?

6 possible matches (shared part number, not a government interchangeability claim): 4820-01-103-3385, 4820-01-103-3436, 4820-01-111-5698. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-103-3331?

Key specifications for 4820-01-103-3331: General Characteristics Item Description: STEEL,AISI-C-1018; 3.125 IN. O/A LG,0.750 IN. OD SHAFT,1.250 IN. LG HEAD,EXTERNALLY THD,1-1/4 IN. 7 UNC-2A THD SIZE,1.250 IN. THD LG,WITH INTERNAL HEX SOCKET,0.500 IN. W ACROSS FLATS,0.625 IN. DEEP A. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-103-3331 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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