The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-505-9896, 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 18 specifications, cited from the U.S. Government catalog. The record lists 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-505-9896 |
| Primary Part Number | ST3M747-4-21 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.164 INCHES NOMINAL IN |
| Fastener Length | 1.694 INCHES MINIMUM AND 1.741 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 5629 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.397 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.303 INCHES MINIMUM AND 1.323 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.522 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Grip Diameter | 0.422 INCHES MINIMUM AND 0.446 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 | Y |
| Part Number | Manufacturer |
|---|---|
| PBF1266-4-21 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VCG0002-4-21 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| AIC688-4-21 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M747-4-21 PRIMARY | The Boeing Company Div Defense (USA) |
| GS1031-4-21 PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M747-4-21 | Houston Precision Fasteners I Lp (USA) |
| HP7747-4-21 | Heartland Precision Fasteners Inc (USA) |
| MB155-4-21 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| S397-4-21 | Huck International, Inc (USA) |
| 122896-4-21 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M747-4-21 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MB155-4-21 | Hi-Shear Corporation (USA) |
| SLB254-4-21 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| Reference | Meaning |
|---|---|
| 122896-4-21 | 5/2 Secondary reference U.S. Government activity |
| 122896-4-21 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5306-01-505-9896 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-505-9896 has 13 manufacturer part numbers on file: PBF1266-4-21 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), VCG0002-4-21 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), AIC688-4-21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M747-4-21 (The Boeing Company Div Defense), GS1031-4-21 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace) and 8 more.
Key specifications for ST3M747-4-21: Head Height: 0.164 INCHES NOMINAL IN; Fastener Length: 1.694 INCHES MINIMUM AND 1.741 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 5629 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.397 INCHES NOMINAL 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.