NSN 3120-01-013-9709 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-013-9709. Manufacturer of record part number: R40731.
Surface Finish: 63.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
Surface Finish: 100.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
Corner Shape: SQUARE ALL CORNERS
Body Outside Diameter: 2.5030 INCHES MINIMUM AND 2.5040 INCHES MAXIMUM IN
Hardness Rating: 60.0 ROCKWELL C MINIMUM AND 65.0 ROCKWELL C MAXIMUM OVERALL
Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES
Material Document and Classification: ASTM A519 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Identification
NSN: 3120-01-013-9709
NIIN: 010139709
FSC: 3120 — Bearings, Plain, Unmounted
FSG: 31 — Bearings
Primary part number: R40731
Manufacturer: Caterpillar Inc Div Caterpillar Defense
General Description
The Bearing,sleeve, cataloged under National Stock Number 3120-01-013-9709, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3120-01-013-9709
Primary Part Number
R40731
Item Name
Bearing,sleeve
FSC / FSG
3120 / 31 — Bearings, Plain, Unmounted
Manufacturer
Caterpillar Inc Div Caterpillar Defense
Status
ACTIVE
Surface Finish
63.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
Surface Finish
100.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
Corner Shape
SQUARE ALL CORNERS
Body Outside Diameter
2.5030 INCHES MINIMUM AND 2.5040 INCHES MAXIMUM IN
Hardness Rating
60.0 ROCKWELL C MINIMUM AND 65.0 ROCKWELL C MAXIMUM OVERALL
Style Designator
SOLID, PLAIN, NO OUTSIDE FLANGES
Material Document and Classification
ASTM A519 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Features Provided
CASEHARDENED
Body Inside Diameter
2.0076 INCHES MINIMUM AND 2.0092 INCHES MAXIMUM IN
Material
STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
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 3120-01-013-9709?
NSN 3120-01-013-9709 is a Bearing,sleeve, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
What part numbers are listed for NSN 3120-01-013-9709?
NSN 3120-01-013-9709 has 4 manufacturer part numbers on file: R40731 (Caterpillar Inc Div Caterpillar Defense), 11614806 (U S Army Tank Automotive Command Amsta-Im-Mm), 4R0731 (Caterpillar Inc Div Caterpillar Defense), 4R731 (Caterpillar Inc Div Caterpillar Defense).
What are the specifications of R40731?
Key specifications for R40731: Surface Finish: 63.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY; Surface Finish: 100.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY; Corner Shape: SQUARE ALL CORNERS; Body Outside Diameter: 2.5030 INCHES MINIMUM AND 2.5040 INCHES MAXIMUM IN. 10 specifications are documented in the U.S. Government catalog.
Is NSN 3120-01-013-9709 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.