The Roll Set,roller Tube Expander, cataloged under National Stock Number 3456-00-640-3670, 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 Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3456-00-640-3670 |
| Primary Part Number | D168-078-E6SPARE |
| Item Name | Roll Set,roller Tube Expander |
| FSC / FSG | 3456 / 34 — Cutting and Forming Tools for Secondary Metalworking Machinery |
| Manufacturer | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric |
| Status | ACTIVE |
| First End Taper Length | 0.250 INCHES NOMINAL FIRST GROUP IN |
| First End Taper Length | 0.023 INCHES NOMINAL THIRD GROUP IN |
| First End Diameter | 0.262 INCHES NOMINAL SECOND GROUP IN |
| First End Diameter | 0.295 INCHES NOMINAL FIRST GROUP IN |
| First End Diameter | 0.390 INCHES NOMINAL THIRD GROUP IN |
| Second End Diameter | 0.250 INCHES NOMINAL FIRST GROUP IN |
| Second End Diameter | 0.249 INCHES NOMINAL THIRD GROUP IN |
| Second End Diameter | 0.295 INCHES NOMINAL SECOND GROUP IN |
| First End Flare Length | 0.118 INCHES NOMINAL THIRD STYLE GROUP IN |
| Second End Taper Length | 0.031 INCHES NOMINAL SECOND GROUP IN |
| Countersink Length | 0.218 INCHES NOMINAL THIRD GROUP IN |
| Second End Flare Diameter | SECOND STYLE GROUP 53.0 DEG AND THIRD STYLE GROUP 0.329 IN. IN |
| Departure From Cited Document | AS MODIFIED BY PARA 3.3.3 ROLLS |
| Roller Quantity | 1 THIRD GROUP |
| Roller Quantity | 1 SECOND GROUP |
| Roller Quantity | 2 FIRST GROUP |
| Nondefinitive Spec/std Data | 1 TYPE AND 1 CLASS |
| 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 | 2.875 INCHES NOMINAL FIRST GROUP IN |
| Roller Style | TAPER SECOND GROUP |
| Roller Style | FLARE THIRD GROUP |
| Roller Style | ROUNDED TAPER 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 |
|---|---|
| D168-078-E6SPARE | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| E164-863-102SPARE ROLL | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| LR6SR6FR1 | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| E-168-670ITEM102SPARE | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| E-168-163ITEM102SPARE | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| 955-596-9LN49T51 | Amec Foster Wheeler North America Corp. Dba Foster Wheeler (USA) |
| E168-130 ITEM 102 SPARE ROLL | Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric (USA) |
| Reference | Meaning |
|---|---|
| 66006 | 5/9 Secondary reference Thomas C. Wilson, Inc. Dba Thomas C Wilson |
| E NAVY EXPANDER LR6 SR6 FR1 | 3/1 Design control — primary reference Elliott Tool Technologies Ltd. |
| 1385500 PC LR6 SR6 FR1 | 5/2 Secondary reference U.S. Government activity |
| 1385500 PC LR6/2/ SR6/1/ FR1/1/ | 3/2 Design control — primary reference U.S. Government activity |
| MIL-E-17624 | 4/1 Identification reference U.S. Government activity |
| LR6SR6FR1 | 5/9 Secondary reference Thomas C. Wilson, Inc. Dba Thomas C Wilson |
| F1385500PCSR6FR1LR6 | 5/2 Secondary reference U.S. Government activity |
NSN 3456-00-640-3670 is a Roll Set,roller Tube Expander, manufactured by Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric, classified under FSC 3456, Cutting and Forming Tools for Secondary Metalworking Machinery. Status: active.
NSN 3456-00-640-3670 has 7 manufacturer part numbers on file: D168-078-E6SPARE (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric), E164-863-102SPARE ROLL (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric), LR6SR6FR1 (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric), E-168-670ITEM102SPARE (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric), E-168-163ITEM102SPARE (Ge Steam Power Inc Dba Ge Steam Power, Inc Div General Electric) and 2 more.
6 possible matches (shared part number, not a government interchangeability claim): 2540-00-739-7731, 6640-01-084-0371, 5950-01-311-3401. Verify interchangeability with system specifications before substitution.
Key specifications for D168-078-E6SPARE: First End Taper Length: 0.250 INCHES NOMINAL FIRST GROUP IN; First End Taper Length: 0.023 INCHES NOMINAL THIRD GROUP IN; First End Diameter: 0.262 INCHES NOMINAL SECOND GROUP IN; First End Diameter: 0.295 INCHES NOMINAL FIRST GROUP IN. 23 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.