The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-175-7572, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Valley-Todeco, Inc. Dba Arconic Fastening Systems. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-175-7572 |
| Primary Part Number | 3M946A1 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 3.100 INCHES NOMINAL IN |
| Distance From Centerline to Flat | 0.760 INCHES NOMINAL IN |
| Concentric Hole Depth | 2.160 INCHES NOMINAL IN |
| Thread Length | 0.656 INCHES NOMINAL IN |
| Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | CONCENTRIC HOLE UNTHREADED |
| Material Document and Classification | 23-112 TYPE B FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.875 INCHES IN |
| Head Style | DEE |
| Thread Direction | RIGHT-HAND |
| Shoulder Diameter | 1.1240 INCHES MINIMUM AND 1.1245 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.734 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 14 |
| Shoulder Length | 2.250 INCHES NOMINAL IN |
| Thread Series Designator | UNF |
| Head Diameter | 1.600 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 |
|---|---|
| 3M946A1 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M946A1 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M946A1 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M946A1 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M946A1 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 3M946A1 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 3M946A1 | 5/2 Secondary reference U.S. Government activity |
| 3M946A1 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-175-7572 is a Bolt,internally Relieved Body, manufactured by Valley-Todeco, Inc. Dba Arconic Fastening Systems, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-175-7572 has 5 manufacturer part numbers on file: 3M946A1 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M946A1 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 3M946A1 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 3M946A1 (Sps Technologies, Llc Dba PB Fasteners), 3M946A1 (Hi-Shear Corporation).
Key specifications for 3M946A1: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 3.100 INCHES NOMINAL IN; Distance From Centerline to Flat: 0.760 INCHES NOMINAL IN; Concentric Hole Depth: 2.160 INCHES NOMINAL IN. 20 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.