PartsTable TECHNICAL DATA SHEET

NSN 3120-01-341-8993Government record, cited

Bearing, Sleeve3120-01-341-8993

NSN 3120-01-341-8993 · NIIN 013418993 · Part number BU-5139-B

Burch Company Inc, the · FSC 3120 — Bearings, Plain, Unmounted · FSG 31 — Bearings · CAGE 09780

Government record, cited

NSN 3120-01-341-8993 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-341-8993. Manufacturer of record part number: BU-5139-B.

Also searched as 3120-01-341-8993 · 3120013418993 · NIIN 013418993 · 01-341-8993 · FSC 3120 Bearings, Plain, Unmounted · CAGE 09780 · BU-5139-B · SA-5139-B

Nearby stock numbers ← 3120-01-341-8806 Bushing, Sleeve · 3120-01-341-8994 Bearing, Sleeve →

3120-01-341-8993 — Bearings, Plain, Unmounted

Features

Bearing,sleeve — FSC 3120
Flange Outside Diameter: 4.0000 INCHES NOMINAL IN
Body Inside Diameter: 1.6875 INCHES NOMINAL IN
Antirotation/lubrication Type and Quantity: 3 HOLE
Flange Width: 0.3750 INCHES NOMINAL IN
Hole Diameter: 0.2188 INCHES NOMINAL FIRST IN
Hole Diameter: 0.2188 INCHES NOMINAL SECOND IN
Hole Diameter: 0.4219 INCHES NOMINAL THIRD IN

Identification

NSN: 3120-01-341-8993
NIIN: 013418993
FSC: 3120 — Bearings, Plain, Unmounted
FSG: 31 — Bearings
Primary part number: BU-5139-B
Manufacturer: Burch Company Inc, the

General Description

The Bearing,sleeve, cataloged under National Stock Number 3120-01-341-8993, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Burch Company Inc, the. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	3120-01-341-8993
Primary Part Number	BU-5139-B
Item Name	Bearing,sleeve
FSC / FSG	3120 / 31 — Bearings, Plain, Unmounted
Manufacturer	Burch Company Inc, the
Status	ACTIVE
Flange Outside Diameter	4.0000 INCHES NOMINAL IN
Body Inside Diameter	1.6875 INCHES NOMINAL IN
Antirotation/lubrication Type and Quantity	3 HOLE
Flange Width	0.3750 INCHES NOMINAL IN
Hole Diameter	0.2188 INCHES NOMINAL FIRST IN
Hole Diameter	0.2188 INCHES NOMINAL SECOND IN
Hole Diameter	0.4219 INCHES NOMINAL THIRD IN

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
BU-5139-B PRIMARY	Burch Company Inc, the (USA)

Reference documents

Reference	Meaning
SA-5139-B	5/9 Secondary reference Burch Company Inc, the

No interchangeability data on file.

Other items in FSC 3120 — Bearings, Plain, Unmounted

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

3120-00-001-1288

3120-00-001-1288 · Item name not on file

3120-00-001-1835

3120-00-001-1835 · Item name not on file

3120-00-001-1838

3120-00-001-1838 · Item name not on file

3120-00-001-1928

3120-00-001-1928 · Item name not on file

3120-00-001-1934

3120-00-001-1934 · Item name not on file

3120-00-001-3933

3120-00-001-3933 · Item name not on file

3120-00-001-3937

3120-00-001-3937 · Item name not on file

3120-00-001-3938

3120-00-001-3938 · Item name not on file

Frequently Asked Questions

What is NSN 3120-01-341-8993?

NSN 3120-01-341-8993 is a Bearing,sleeve, manufactured by Burch Company Inc, the, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.

What part numbers are listed for NSN 3120-01-341-8993?

NSN 3120-01-341-8993 has 1 manufacturer part number on file: BU-5139-B (Burch Company Inc, the).

What are the specifications of BU-5139-B?

Key specifications for BU-5139-B: Flange Outside Diameter: 4.0000 INCHES NOMINAL IN; Overall Length: 5.3750 INCHES NOMINAL IN; Body Inside Diameter: 1.6875 INCHES NOMINAL IN; Special Features: FLANGE FLATTED ONE END. 7 specifications are documented in the U.S. Government catalog.

Is NSN 3120-01-341-8993 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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