The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-146-9886, 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 22 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-146-9886 |
| Primary Part Number | 307NC6275 |
| Item Name | Bolt,internally 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 | 0.812 INCHES NOMINAL IN |
| Fastener Length | 5.375 INCHES NOMINAL IN |
| Internal Thread Length | 1.188 INCHES NOMINAL CONCENTRIC HOLE IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) CONCENTRIC HOLE |
| Internal Thread Direction | RIGHT-HAND CONCENTRIC HOLE |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Threads Per Inch | 16 CONCENTRIC HOLE |
| Style Designator | CONCENTRIC HOLE THREADED |
| Material Document and Classification | MIL-S-853A,CL 5A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL A |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | ROUND W/WRENCH FLATS |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES CONCENTRIC HOLE IN |
| Width Between Flats | 0.750 INCHES NOMINAL IN |
| Shoulder Diameter | 0.6235 INCHES MINIMUM AND 0.6240 INCHES MAXIMUM IN |
| Internal Thread Class | 2B CONCENTRIC HOLE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 13 |
| Material | STEEL COMP 420 OVERALL |
| Shoulder Length | 2.656 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.875 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 |
|---|---|
| NC-6275 PIECE 307 | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| 307NC6275 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 307NC6275 | 3/9 Design control — primary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| 3224024 PIECE 307 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| NC-6275 PIECE 307 | 5/9 Secondary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
| NC-6275 PIECE 307 | 5/9 Secondary reference U.S. Government activity |
| 307NC6275 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-146-9886 is a Bolt,internally 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 5306-01-146-9886 has 2 manufacturer part numbers on file: NC-6275 PIECE 307 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions), 307NC6275 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
Key specifications for 307NC6275: Head Height: 0.812 INCHES NOMINAL IN; Fastener Length: 5.375 INCHES NOMINAL IN; Internal Thread Length: 1.188 INCHES NOMINAL CONCENTRIC HOLE IN; Thread Series: UNIFIED NATIONAL COARSE (UNC) CONCENTRIC HOLE. 22 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.