Counterbore Mach-34420-01-255-8613

NSN 4420-01-255-8613 · NIIN 012558613 · Part number 12G451-25

S and K Tool and Die Inc · FSC 4420 — Heat Exchangers and Steam Condensers · FSG 44 — Furnace, Steam, Drying, Nuclear Reactors · CAGE 0ATW3

Government record, cited

NSN 4420-01-255-8613 — this item is cataloged by the U.S. Government under National Stock Number 4420-01-255-8613. Manufacturer of record part number: 12G451-25.

Also searched as 4420-01-255-8613 · 4420012558613 · NIIN 012558613 · 01-255-8613 · FSC 4420 Heat Exchangers and Steam Condensers · CAGE 0ATW3 · 12G451-25

Nearby stock numbers ← 4420-01-255-7848 Bonnet, Fluid Cooler, Industrial · 4420-01-255-9069 Core Assembly, Fluid Cooler →

Features

Counterbore Mach-3 — FSC 4420
1 manufacturer part number on file
Manufacturer of record: S and K Tool and Die Inc

Identification

NSN: 4420-01-255-8613
NIIN: 012558613
FSC: 4420 — Heat Exchangers and Steam Condensers
FSG: 44 — Furnace, Steam, Drying, Nuclear Reactors
Primary part number: 12G451-25
Manufacturer: S and K Tool and Die Inc

General Description

The Counterbore Mach-3, cataloged under National Stock Number 4420-01-255-8613, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is S and K Tool and Die Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Catalog Facts

Item Name	Counterbore Mach-3
FSC / FSG	4420 — Heat Exchangers and Steam Condensers (FSG 44)
Manufacturers	S and K Tool and Die Inc (CAGE 0ATW3)

Technical Specifications

Parameter	Value
NSN	4420-01-255-8613
Primary Part Number	12G451-25
Item Name	Counterbore Mach-3
FSC / FSG	4420 / 44 — Heat Exchangers and Steam Condensers
Manufacturer	S and K Tool and Die Inc
Status	ACTIVE

Lifecycle & Compliance

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

Cross-Reference Index

Part Number	Manufacturer
12G451-25 PRIMARY	S and K Tool and Die Inc (USA)

No interchangeability data on file.

Other items in FSC 4420 — Heat Exchangers and Steam Condensers

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

4420-00-003-2812

CORE ASSEMBLY,FLUID HEATER,INDUS

4420-00-004-1071

4420-00-004-1071 · Item name not on file

4420-00-004-1072

4420-00-004-1072 · Item name not on file

4420-00-004-1073

4420-00-004-1073 · Item name not on file

4420-00-004-1074

4420-00-004-1074 · Item name not on file

4420-00-004-3860

COOLER,FLUID,INDUSTRIAL

4420-00-004-5260

4420-00-004-5260 · Item name not on file

4420-00-005-2335

PURGE ORIFICE ASSEMBLY

Frequently Asked Questions

What is NSN 4420-01-255-8613?

NSN 4420-01-255-8613 is a Counterbore Mach-3, manufactured by S and K Tool and Die Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.

What part numbers are listed for NSN 4420-01-255-8613?

NSN 4420-01-255-8613 has 1 manufacturer part number on file: 12G451-25 (S and K Tool and Die Inc).

Is NSN 4420-01-255-8613 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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