The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-216-7731, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 13 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 37 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-216-7731 |
| Primary Part Number | 187685PC157 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| Head Height | 0.188 INCHES NOMINAL IN |
| Fastener Length | 2.313 INCHES NOMINAL IN |
| Thread Length | 0.750 INCHES NOMINAL IN |
| First Diameter From Head | 0.594 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.250 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 3 |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Third Diameter From Head | 0.375 INCHES NOMINAL IN |
| Thread Series Designator | UNF |
| Head Diameter | 0.598 INCHES NOMINAL IN |
| 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 |
|---|---|
| 187685PC157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 188081PC157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 185431PC157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 187681PC157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| D45872PP22K4NA PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 188487PC157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 185413PC157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 22K4NA PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 1R3000-30-157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| IR3000-30-157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 185417PC157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 188085PC157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 187700PC157 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 22K4NA | 5/9 Secondary reference U.S. Government activity |
| 187681PC157 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 188085PC157 | 5/9 Secondary reference U.S. Government activity |
| IR3000-30-157 | 5/9 Secondary reference U.S. Government activity |
| 185417PC157 | 5/9 Secondary reference Ingersoll Rand Co |
| 185417PC157 | 5/9 Secondary reference U.S. Government activity |
| 1R3000-30-157 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 188085PC157 | 5/9 Secondary reference Ingersoll Rand Co |
| D45872PP22K4NA | 5/9 Secondary reference Ingersoll Rand Co |
| IR3000-30-157 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 185413PC157 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 187700PC157 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 185417PC157 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 22K4NA | 5/9 Secondary reference Ingersoll Rand Co |
| 188487PC157 | 5/9 Secondary reference U.S. Government activity |
| 1R3000-30-157 | 5/9 Secondary reference Ingersoll Rand Co |
| 187681PC157 | 5/9 Secondary reference U.S. Government activity |
| 188081PC157 | 5/9 Secondary reference U.S. Government activity |
| 188487PC157 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 188081PC157 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 5306-00-216-7731 is a Bolt,externally Relieved Body, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-216-7731 has 13 manufacturer part numbers on file: 187685PC157 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), 188081PC157 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), 185431PC157 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), 187681PC157 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), D45872PP22K4NA (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions) and 8 more.
Key specifications for 187685PC157: Head Height: 0.188 INCHES NOMINAL IN; Fastener Length: 2.313 INCHES NOMINAL IN; Thread Length: 0.750 INCHES NOMINAL IN; First Diameter From Head: 0.594 INCHES NOMINAL IN. 14 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.