The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-894-2124, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-894-2124 |
| Primary Part Number | 123AMM40185-1 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Head Height | 0.190 INCHES NOMINAL IN |
| Fastener Length | 2.562 INCHES NOMINAL IN |
| Thread Length | 0.964 INCHES MAXIMUM IN |
| Hardness Rating | 37.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.069 INCHES MINIMUM AND 0.074 INCHES MAXIMUM FIRST HOLE IN |
| Style Designator | COUNTERBORE UNTHREADED |
| Nominal Thread Diameter | 1.125 INCHES IN |
| Counterbore Depth | 1.312 INCHES NOMINAL IN |
| Head Style | ROUND W/WRENCH FLATS |
| Thread Direction | RIGHT-HAND |
| Counterbore Diameter | 0.858 INCHES MINIMUM AND 0.869 INCHES MAXIMUM IN |
| Width Between Flats | 1.500 INCHES NOMINAL IN |
| Shoulder Diameter | 1.247 INCHES MINIMUM AND 1.248 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.717 INCHES MINIMUM AND 0.726 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 165 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 4340 OVERALL |
| Shoulder Length | 1.598 INCHES NOMINAL IN |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.437 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 1.750 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 |
|---|---|
| 123AMM40185-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 123AMM40185-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5306-00-894-2124 is a Bolt,internally Relieved Body, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-894-2124 has 1 manufacturer part number on file: 123AMM40185-1 (Northrop Grumman Systems Corporation).
Key specifications for 123AMM40185-1: Head Height: 0.190 INCHES NOMINAL IN; Fastener Length: 2.562 INCHES NOMINAL IN; Thread Length: 0.964 INCHES MAXIMUM IN; Hardness Rating: 37.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL. 23 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.