The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-914-1072, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-914-1072 |
| Primary Part Number | 2155-6S |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 0.313 INCHES MAXIMUM IN |
| Concentric Hole Depth | 0.313 INCHES NOMINAL IN |
| Thread Length | 0.219 INCHES MAXIMUM IN |
| Style Designator | COUNTERBORE UNTHREADED |
| Nominal Thread Diameter | 0.562 INCHES IN |
| Counterbore Depth | 0.250 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Counterbore Diameter | 0.219 INCHES NOMINAL IN |
| Width Between Flats | 0.750 INCHES NOMINAL IN |
| Concentric Hole Diameter | 0.188 INCHES NOMINAL IN |
| Surface Treatment | NICKEL OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 2155-6S PRIMARY | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (USA) |
| Reference | Meaning |
|---|---|
| 8003-2SPCL. | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5306-00-914-1072 is a Bolt,internally Relieved Body, manufactured by Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-914-1072 has 1 manufacturer part number on file: 2155-6S (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives).
Key specifications for 2155-6S: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 0.313 INCHES MAXIMUM IN; Concentric Hole Depth: 0.313 INCHES NOMINAL IN; Thread Length: 0.219 INCHES MAXIMUM IN. 17 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.