The Expander,seal Ring, cataloged under National Stock Number 2520-00-910-3728, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2520-00-910-3728 |
| Primary Part Number | 8351893-7 |
| Item Name | Expander,seal Ring |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL QQ-S-777 COMP 1085 THRU 1095 ROCKWELL HARDNESS 15N 85 TO 87; 23.47 IN. LG; 0.0095 IN. MIN 0.0105 IN. MAX THK; 0.083 IN. MIN 0.087 IN. MAX W IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 8351893-7 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2520009103728 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 291043C1 | 5/9 Secondary reference U.S. Government activity |
| 6776744 | 5/9 Secondary reference General Motors Corp |
| 6776744 | C/1 Advisory reference — outside the item-of-supply concept The W.w. Williams Company, Llc |
| 6776744 | 3/9 Design control — primary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| 6776744 | 5/9 Secondary reference Euclid Inc |
NSN 2520-00-910-3728 is a Expander,seal Ring, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-00-910-3728 has 1 manufacturer part number on file: 8351893-7 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8351893-7: General Characteristics Item Description: STEEL QQ-S-777 COMP 1085 THRU 1095 ROCKWELL HARDNESS 15N 85 TO 87; 23.47 IN. LG; 0.0095 IN. MIN 0.0105 IN. MAX THK; 0.083 IN. MIN 0.087 IN. MAX W IN. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.