The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-318-3286, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Support Services Corp. Government technical data includes 24 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-318-3286 |
| Primary Part Number | 147C608H01 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Head Height | 0.260 INCHES NOMINAL IN |
| Fastener Length | 2.120 INCHES NOMINAL IN |
| Internal Thread Length | 0.250 INCHES NOMINAL COUNTERBORE IN |
| Thread Series | UNF COUNTERBORE |
| Concentric Hole Depth | 0.310 INCHES NOMINAL IN |
| Internal Thread Direction | RIGHT-HAND COUNTERBORE |
| Thread Length | 0.785 INCHES NOMINAL IN |
| Threads Per Inch | 32 COUNTERBORE |
| Style Designator | COUNTERBORE THREADED |
| Material Document and Classification | ASTM A582 COND. A ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES COUNTERBORE IN |
| Shoulder Diameter | 1.000 INCHES NOMINAL IN |
| Internal Thread Class | 2B COUNTERBORE |
| Concentric Hole Diameter | 0.159 INCHES MINIMUM AND 0.164 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 303 OVERALL |
| Shoulder Length | 1.240 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.500 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 |
|---|---|
| 147C608H01 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 147C608H01 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5306-01-318-3286 is a Bolt,internally Relieved Body, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-318-3286 has 1 manufacturer part number on file: 147C608H01 (Northrop Grumman Support Services Corp).
Key specifications for 147C608H01: Head Height: 0.260 INCHES NOMINAL IN; Fastener Length: 2.120 INCHES NOMINAL IN; Internal Thread Length: 0.250 INCHES NOMINAL COUNTERBORE IN; Thread Series: UNF COUNTERBORE. 24 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.