The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-197-1577, 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 20 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-197-1577 |
| Primary Part Number | PBF 1266-4-5 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.118 INCHES NOMINAL IN |
| Fastener Length | 0.604 INCHES MINIMUM AND 0.651 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.282 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Width Between Flats | 0.448 INCHES MINIMUM AND 0.455 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| PBF 1266-4-5 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC688-4-5 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VS3191-4-5 | Howmet Global Fastening Systems Inc (USA) |
| 122896-4-5 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HP7747-4-5 | Heartland Precision Fasteners Inc (USA) |
| MB155-4-5 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M747-4-5 | Reid Products Inc. Dba Reid Products Inc (USA) |
| S397-4-5 | Huck International, Inc (USA) |
| VCG0002-4-5 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB155-4-5 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M747-4-5 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| GS1031-4-5 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| Reference | Meaning |
|---|---|
| ST3M747-4-5 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| S397-4-5 | 5/9 Secondary reference U.S. Government activity |
| 122896-4-5 | 3/2 Design control — primary reference U.S. Government activity |
| VS3191-4-5 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-197-1577 is a Bolt,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-197-1577 has 12 manufacturer part numbers on file: PBF 1266-4-5 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), AIC688-4-5 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), VS3191-4-5 (Howmet Global Fastening Systems Inc), 122896-4-5 (Sps Technologies, Llc Dba PB Fasteners), HP7747-4-5 (Heartland Precision Fasteners Inc) and 7 more.
Key specifications for PBF 1266-4-5: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.118 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.