Adapter, Socket Wrench5120-01-535-9278

NSN 5120-01-535-9278 · NIIN 015359278 · Part number 4C9818

Caterpillar Inc Div Caterpillar Defense · FSC 5120 — Hand Tools, Nonedged, Nonpowered · FSG 51 — Hand Tools · CAGE 11083

Government record, cited

NSN 5120-01-535-9278 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-535-9278. Manufacturer of record part number: 4C9818.

Also searched as 5120-01-535-9278 · 5120015359278 · NIIN 015359278 · 01-535-9278 · FSC 5120 Hand Tools, Nonedged, Nonpowered · CAGE 11083 · 4C9818

Nearby stock numbers ← 5120-01-535-9091 Contact Positioner, Terminal Crim · 5120-01-535-9279 Pliers, Slip Joint →

Features

Adapter,socket Wrench — FSC 5120
Drive Surface Size: 0.500 INCHES NOMINAL SECOND END IN
Drive Surface Size: 0.438 INCHES NOMINAL FIRST END IN
Style Designator: EXTERNAL-EXTERNAL
Features Provided: POWER TOOL
Drive End Shape: HEXAGON FIRST END EXTERNAL
Drive End Shape: SQUARE SECOND END EXTERNAL
Surface Treatment: OXIDE OVERALL

Identification

NSN: 5120-01-535-9278
NIIN: 015359278
FSC: 5120 — Hand Tools, Nonedged, Nonpowered
FSG: 51 — Hand Tools
Primary part number: 4C9818
Manufacturer: Caterpillar Inc Div Caterpillar Defense

General Description

The Adapter,socket Wrench, cataloged under National Stock Number 5120-01-535-9278, is classified within Federal Supply Class 5120 (Hand Tools, Nonedged, Nonpowered) of the Hand Tools group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5120-01-535-9278
Primary Part Number	4C9818
Item Name	Adapter,socket Wrench
FSC / FSG	5120 / 51 — Hand Tools, Nonedged, Nonpowered
Manufacturer	Caterpillar Inc Div Caterpillar Defense
Status	ACTIVE
Drive Surface Size	0.500 INCHES NOMINAL SECOND END IN
Drive Surface Size	0.438 INCHES NOMINAL FIRST END IN
Style Designator	EXTERNAL-EXTERNAL
Features Provided	POWER TOOL
Drive End Shape	HEXAGON FIRST END EXTERNAL
Drive End Shape	SQUARE SECOND END EXTERNAL
Surface Treatment	OXIDE OVERALL
Material	STEEL OVERALL

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
4C9818 PRIMARY	Caterpillar Inc Div Caterpillar Defense (USA)

No interchangeability data on file.

Other items in FSC 5120 — Hand Tools, Nonedged, Nonpowered

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5120-00-001-2642

ADAPTER,TORQUE WRENCH

5120-00-001-2644

ADAPTER,TORQUE WRENCH

5120-00-001-2650

INSERTER,SEAL

5120-00-001-2651

5120-00-001-2651 · Item name not on file

5120-00-001-2652

INSTALLING TOOL,SHAFT

5120-00-001-2653

REMOVER,PREFORMED PACKING

5120-00-001-2654

REMOVER,PREFORMED PACKING

5120-00-001-2655

SOCKET,WRENCH,FACE SPANNER

Frequently Asked Questions

What is NSN 5120-01-535-9278?

NSN 5120-01-535-9278 is a Adapter,socket Wrench, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5120, Hand Tools, Nonedged, Nonpowered. Status: active.

What part numbers are listed for NSN 5120-01-535-9278?

NSN 5120-01-535-9278 has 1 manufacturer part number on file: 4C9818 (Caterpillar Inc Div Caterpillar Defense).

What are the specifications of 4C9818?

Key specifications for 4C9818: Drive Surface Size: 0.500 INCHES NOMINAL SECOND END IN; Drive Surface Size: 0.438 INCHES NOMINAL FIRST END IN; Style Designator: EXTERNAL-EXTERNAL; Features Provided: POWER TOOL. 8 specifications are documented in the U.S. Government catalog.

Is NSN 5120-01-535-9278 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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