The Ring,piston, cataloged under National Stock Number 4310-01-129-1707, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is American Turbo Systems Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-01-129-1707 |
| Primary Part Number | 100894-2 |
| Item Name | Ring,piston |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | American Turbo Systems Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-L-8937 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | 17-4PH ASSN STD 1ST MATERIAL RESPONSE OR 17-7PHSS ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | PLAIN RECTANGULAR, STRAIGHT FACE |
| Joint Style | VERTICAL JOINT |
| Radial Wall Thickness | 0.1550 INCHES MINIMUM AND 0.1600 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Surface Treatment | GRAPHITE OVERALL |
| Material | STEEL 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 |
|---|---|
| 100894-2 PRIMARY | American Turbo Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 100894-2 | 5/9 Secondary reference Walker Power Systems, Inc. Dba Tiernay Turbines |
NSN 4310-01-129-1707 is a Ring,piston, manufactured by American Turbo Systems Inc, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-129-1707 has 1 manufacturer part number on file: 100894-2 (American Turbo Systems Inc).
Key specifications for 100894-2: Surface Treatment Document and Classification: MIL-L-8937 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Width: 0.0290 INCHES MINIMUM AND 0.0300 INCHES MAXIMUM IN; Material Document and Classification: 17-4PH ASSN STD 1ST MATERIAL RESPONSE OR 17-7PHSS ASSN STD 2ND MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: PLAIN RECTANGULAR, STRAIGHT FACE. 8 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.