The O-Ring, cataloged under National Stock Number 5331-01-311-5948, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Hartmann Controls, Inc Div Hartmann Controls. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Hartmann Controls, Inc Div Hartmann Controls (CAGE 63568) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-311-5948 |
| Primary Part Number | 31357-113 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Hartmann Controls, Inc Div Hartmann Controls |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 31357-113 PRIMARY | Hartmann Controls, Inc Div Hartmann Controls (USA) |
| Reference | Meaning |
|---|---|
| 3542-438 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 2487-115 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 3317-516 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5331-01-311-5948 is a O-Ring, manufactured by Hartmann Controls, Inc Div Hartmann Controls, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-311-5948 has 1 manufacturer part number on file: 31357-113 (Hartmann Controls, Inc Div Hartmann Controls).
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.