The O-Ring, cataloged under National Stock Number 5331-01-548-3856, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Optical Systems Technology, Inc Dba Osti Startron. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-548-3856 |
| Primary Part Number | 55616 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Optical Systems Technology, Inc Dba Osti Startron |
| Status | ACTIVE |
| 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 |
|---|---|
| E00461 | Fabbrica D'armi Pietro Beretta Spa (ITA) |
| 55616 PRIMARY | Optical Systems Technology, Inc Dba Osti Startron (USA) |
| LFEMUMS-011 | L.f.e. (FRA) |
NSN 5331-01-548-3856 is a O-Ring, manufactured by Optical Systems Technology, Inc Dba Osti Startron, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-548-3856 has 3 manufacturer part numbers on file: E00461 (Fabbrica D'armi Pietro Beretta Spa), 55616 (Optical Systems Technology, Inc Dba Osti Startron), LFEMUMS-011 (L.f.e.).
1 possible match (shared part number, not a government interchangeability claim): 1240-01-594-0175. Verify interchangeability with system specifications before substitution.
Key specifications for 55616: Part Name Assigned by Controlling Agency: O-RING,BATTERY DOOR; End Item Identification: 5855-01-547-9489;SIGHT,NIGHT VISION SNIPERSCOPE. 0 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.