The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-528-5515, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-528-5515 |
| Primary Part Number | PBF1253-8D19 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Head Height | 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN |
| Fastener Length | 1.821 INCHES MINIMUM AND 1.868 INCHES MAXIMUM IN |
| Thread Length | 0.623 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 08524-B-17019 MANUFACTURERS STANDARD |
| Grip Length | 1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM IN |
| Width Between Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Grip Diameter | 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.693 INCHES MINIMUM AND 1.750 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| PBF1253-8D19 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB61-8D19 PRIMARY | Hi-Shear Corporation (USA) |
| 11825-8D19 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VS3204-8D19 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M453-8D19 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| AIC753-8D19 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M453-8D19 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| MB61-8D19 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| GS1016-8D19 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| BM17019-8D19 PRIMARY | Huck International, Inc (USA) |
| ST3M453-8D19 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| VAL23029-8D19 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 109453-8D19 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| S11-1060-8D19 PRIMARY | Rotair Aerospace Corp (USA) |
| Reference | Meaning |
|---|---|
| BM17019-8D19 | 5/9 Secondary reference U.S. Government activity |
| ST3M453-8D19 | 5/9 Secondary reference Allied Signal Inc Norplex Oak Div |
| VS3204-8D19 | 5/9 Secondary reference U.S. Government activity |
| KS3020-8D19 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| ST3M453-8D19 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| S353-8D19 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M453-8D19 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5306-00-528-5515 is a Bolt,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-528-5515 has 14 manufacturer part numbers on file: PBF1253-8D19 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), MB61-8D19 (Hi-Shear Corporation), 11825-8D19 (Reid Products Inc. Dba Reid Products Inc), VS3204-8D19 (Howmet Global Fastening Systems Inc), ST3M453-8D19 (M.s. Aerospace Inc. Dba Ms Aerospace Inc) and 9 more.
Key specifications for PBF1253-8D19: Head Height: 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN; Fastener Length: 1.821 INCHES MINIMUM AND 1.868 INCHES MAXIMUM IN; Thread Length: 0.623 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN. 18 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.