The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-597-9648, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 17 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-597-9648 |
| Primary Part Number | 3M1275E3D5A |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 0.625 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-L-87132, TYPE I, CLASS B MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.315 INCHES NOMINAL IN |
| Hole Configuration Style | ROUND |
| Material Document and Classification | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.310 INCHES NOMINAL IN |
| Grip Diameter | 0.2021 INCHES MINIMUM AND 0.2026 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | NICKEL ALLOY 718 OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.070 INCHES NOMINAL IN |
| Head Diameter | 0.3729 INCHES MINIMUM AND 0.3813 INCHES MAXIMUM 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 |
|---|---|
| 3M1275E3D5A | Saturn Fasteners Inc (USA) |
| 3M1275E3D5A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M1275E3D5A | Howmet Global Fastening Systems Inc (USA) |
| 3M1275E3D5A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11857E3D5A | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1275E3D5A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M1275E3D5A | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M1275E3D5A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M1275E3D5A | Heartland Precision Fasteners Inc (USA) |
| 3M1275E3D5A | Linread Ltd (GBR) |
| 3M1275E3D5A | Camcar Llc Div Camcar Llc (USA) |
| 3M1275E3D5A | Houston Precision Fasteners I Lp (USA) |
| 3M1275E3D5A | Huck International, Inc (USA) |
| 3M1275E3D5A PRIMARY | The Boeing Company Div Defense (USA) |
| 3M1275E3D5A | West Coast Aerospace, Inc. (USA) |
| 3M1275E3D5A | Hi-Shear Corporation (USA) |
| 3M1275E3D5A | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| 3M1275E3D5A | 5/2 Secondary reference U.S. Government activity |
| 3M1275E3D5A | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-597-9648 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-597-9648 has 17 manufacturer part numbers on file: 3M1275E3D5A (Saturn Fasteners Inc), 3M1275E3D5A (Fastener Innovation Technology, Inc. Dba F I T), 3M1275E3D5A (Howmet Global Fastening Systems Inc), 3M1275E3D5A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 11857E3D5A (Reid Products Inc. Dba Reid Products Inc) and 12 more.
Key specifications for 3M1275E3D5A: Fastener Length: 0.625 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-L-87132, TYPE I, CLASS B MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.315 INCHES NOMINAL IN; Hole Configuration Style: ROUND. 21 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.