The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-478-2852, 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 17 specifications, cited from the U.S. Government catalog. The record lists 12 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-478-2852 |
| Primary Part Number | PBF1253-3-20 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Head Height | 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Fastener Length | 1.566 INCHES MINIMUM AND 1.612 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.331 INCHES NOMINAL IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.250 INCHES NOMINAL IN |
| Width Between Flats | 0.419 INCHES MINIMUM IN |
| Grip Diameter | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 3160 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| FIT7047-3-20 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 11825-3-20 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 109453-3-20 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| S11-1060-3-20 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| VAL23029-3-20 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB61-3-20 | Hi-Shear Corporation (USA) |
| HP5453-3-20 | Heartland Precision Fasteners Inc (USA) |
| MB61-3-20 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BM17019-3-20 | Huck International, Inc (USA) |
| AIC753-3-20 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VS3204-3-20 | Howmet Global Fastening Systems Inc (USA) |
| PBF1253-3-20 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| ST3M453-3-20 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 109453-3-20 | 5/2 Secondary reference U.S. Government activity |
| 109453-3-20 | 5/9 Secondary reference Sps Technologies Inc |
| KS3020-3-20 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| ST3M453 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 5306-01-478-2852 is a Bolt,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-478-2852 has 12 manufacturer part numbers on file: FIT7047-3-20 (Fastener Innovation Technology, Inc. Dba F I T), 11825-3-20 (Reid Products Inc. Dba Reid Products Inc), 109453-3-20 (Sps Technologies, Llc Dba PB Fasteners), S11-1060-3-20 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), VAL23029-3-20 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 7 more.
6 possible matches (shared part number, not a government interchangeability claim): 5306-01-478-2902, 5306-01-478-2944, 5306-01-478-2953. Verify interchangeability with system specifications before substitution.
Key specifications for PBF1253-3-20: Head Height: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN; Fastener Length: 1.566 INCHES MINIMUM AND 1.612 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.331 INCHES NOMINAL IN. 17 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.