The Roll Set,roller Tube Expander, cataloged under National Stock Number 3456-00-640-3683, is classified within Federal Supply Class 3456 (Cutting and Forming Tools for Secondary Metalworking Machinery) of the Metalworking Machinery (continued) group. The manufacturer of record is Babcock & Wilcox Co. Government technical data includes 24 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3456-00-640-3683 |
| Primary Part Number | LR68SR68FR10 |
| Item Name | Roll Set,roller Tube Expander |
| FSC / FSG | 3456 / 34 — Cutting and Forming Tools for Secondary Metalworking Machinery |
| Manufacturer | Babcock & Wilcox Co |
| Status | ACTIVE |
| First End Taper Length | 0.375 INCHES NOMINAL FIRST GROUP IN |
| First End Taper Length | 0.030 INCHES NOMINAL THIRD GROUP IN |
| First End Diameter | 0.356 INCHES NOMINAL SECOND GROUP IN |
| First End Diameter | 0.389 INCHES NOMINAL FIRST GROUP IN |
| First End Diameter | 0.438 INCHES NOMINAL THIRD GROUP IN |
| Second End Diameter | 0.342 INCHES NOMINAL THIRD GROUP IN |
| Second End Diameter | 0.344 INCHES NOMINAL FIRST GROUP IN |
| Second End Diameter | 0.389 INCHES NOMINAL SECOND GROUP IN |
| First End Flare Length | 0.165 INCHES NOMINAL THIRD STYLE GROUP IN |
| Second End Taper Length | 0.375 INCHES NOMINAL SECOND GROUP IN |
| Second End Taper Length | 0.031 INCHES NOMINAL FIRST GROUP IN |
| Countersink Length | 0.190 INCHES NOMINAL THIRD GROUP IN |
| Second End Flare Diameter | 53.0 DEG SECOND STYLE GROUP,0.430 IN. LG THIRD STYLE GROUP IN |
| Departure From Cited Document | AS MODIFIED BY PAR. 3.3.1 EXPANDERS AND PAR. 3.3.3 ROLLS |
| Roller Quantity | 1 THIRD GROUP |
| Roller Quantity | 1 SECOND GROUP |
| Roller Quantity | 2 FIRST GROUP |
| Nondefinitive Spec/std Data | 3 CLASS AND 1 TYPE |
| Main Body Overall Length | 0.500 INCHES NOMINAL THIRD GROUP IN |
| Main Body Overall Length | 2.125 INCHES NOMINAL SECOND GROUP IN |
| Main Body Overall Length | 2.859 INCHES NOMINAL FIRST GROUP IN |
| Roller Style | TAPER SECOND GROUP |
| Roller Style | FLARE THIRD GROUP |
| Roller Style | OVERLAPPING FIRST GROUP |
| 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 |
|---|---|
| LR68SR68FR10 | Babcock & Wilcox Co (USA) |
| Reference | Meaning |
|---|---|
| F1385500PCSR68FR10LR68 | 3/2 Design control — primary reference U.S. Government activity |
| MIL-E-17624 | 4/1 Identification reference U.S. Government activity |
| X LR-68 X FR-10 | 5/2 Secondary reference U.S. Government activity |
NSN 3456-00-640-3683 is a Roll Set,roller Tube Expander, manufactured by Babcock & Wilcox Co, classified under FSC 3456, Cutting and Forming Tools for Secondary Metalworking Machinery. Status: active.
NSN 3456-00-640-3683 has 1 manufacturer part number on file: LR68SR68FR10 (Babcock & Wilcox Co).
Key specifications for LR68SR68FR10: First End Taper Length: 0.375 INCHES NOMINAL FIRST GROUP IN; First End Taper Length: 0.030 INCHES NOMINAL THIRD GROUP IN; First End Diameter: 0.356 INCHES NOMINAL SECOND GROUP IN; First End Diameter: 0.389 INCHES NOMINAL FIRST GROUP IN. 24 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.