The Gasket, cataloged under National Stock Number 5330-01-127-7121, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Siemens Energy, Inc.. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 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 | 5330-01-127-7121 |
| Primary Part Number | RGR-686B |
| Item Name | Gasket |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| Cross-Sectional Thickness | 0.031 INCHES NOMINAL IN |
| Style Designator | NON-CIRCULAR |
| Aperture Diameter | 1.875 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Center to Center Distance Between Bolt Holes Along Length | 2.500 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Center to Center Distance Between Bolt Holes Along Width | 2.500 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Outside Edge to Bolt Hole Center Distance Along Length | 0.500 INCHES NOMINAL IN |
| Outside Corner Radius | 0.500 INCHES NOMINAL IN |
| Hole Diameter | 0.438 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Outside Edge to Bolt Hole Center Distance Along Width | 0.500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 5330-01-127-7121 is a Gasket, manufactured by Siemens Energy, Inc., classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-127-7121 has 2 manufacturer part numbers on file: A-7372 (Siemens Energy, Inc.), RGR-686B (Siemens Energy, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-366-2038. Verify interchangeability with system specifications before substitution.
Key specifications for RGR-686B: Cross-Sectional Thickness: 0.031 INCHES NOMINAL IN; Style Designator: NON-CIRCULAR; Overall Length: 3.500 INCHES NOMINAL IN; Overall Width: 3.500 INCHES NOMINAL IN. 10 specifications are 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.