The Bushing,sleeve, cataloged under National Stock Number 3120-01-237-9433, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Tridair Products. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-237-9433 |
| Primary Part Number | GB540CL4-2 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Interior Flange Hole Diameter | 0.2500 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN |
| Flange Outside Diameter | 0.5300 INCHES MINIMUM AND 0.5400 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.3070 INCHES MINIMUM AND 0.3110 INCHES MAXIMUM IN |
| Body Inside Diameter | 0.2800 INCHES MINIMUM AND 0.2830 INCHES MAXIMUM IN |
| Flange Width | 0.0410 INCHES MINIMUM AND 0.0450 INCHES MAXIMUM IN |
| Material | STEEL COMP 304 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| GB540CL4-2 PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| CA21208C-4-2 | 5/1 Secondary reference Howmet Global Fastening Systems Inc. Div Tridair Products |
| GB540CL4-2 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 3120-01-237-9433 is a Bushing,sleeve, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-237-9433 has 1 manufacturer part number on file: GB540CL4-2 (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for GB540CL4-2: Interior Flange Hole Diameter: 0.2500 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN; Flange Outside Diameter: 0.5300 INCHES MINIMUM AND 0.5400 INCHES MAXIMUM IN; Body Outside Diameter: 0.3070 INCHES MINIMUM AND 0.3110 INCHES MAXIMUM IN; Overall Length: 0.1730 INCHES NOMINAL IN. 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.