The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-214-3476, 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 22 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-214-3476 |
| Primary Part Number | ST3M753-5H27 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN |
| Head Height | 0.247 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN |
| Fastener Length | 2.110 INCHES MINIMUM AND 2.140 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN |
| Thread Length | 0.975 INCHES MINIMUM AND 1.025 INCHES MAXIMUM IN |
| Hole Configuration Style | DOUBLE HEXAGON FLATS |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Width Between Flats | 0.360 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.050 INCHES MINIMUM AND 0.060 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 |
|---|---|
| MB156-5H27 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| MB156-5H27 | Hi-Shear Corporation (USA) |
| PBF1267-5H27 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M753-5H27 PRIMARY | The Boeing Company Div Defense (USA) |
| VFK600-5H27 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| AIC763-5H27 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GS1032-5H27 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M753-5H-27 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| S343-5H-27 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| S343-5H-27 | 5/9 Secondary reference U.S. Government activity |
| VFK600-5H27 | 5/9 Secondary reference Clayton-Wright Howard Ltd |
| VS3190-5H27 | 5/9 Secondary reference U.S. Government activity |
| 122897-5H27 | 5/2 Secondary reference U.S. Government activity |
| VS3190-5H27 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| ST3M753-5H-27 | 5/9 Secondary reference Pruitt Energy Sources Inc |
| VS319-5H27 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-214-3476 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-214-3476 has 8 manufacturer part numbers on file: MB156-5H27 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), MB156-5H27 (Hi-Shear Corporation), PBF1267-5H27 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M753-5H27 (The Boeing Company Div Defense), VFK600-5H27 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 3 more.
Key specifications for ST3M753-5H27: Extended Washer Thickness: 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN; Head Height: 0.247 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN; Fastener Length: 2.110 INCHES MINIMUM AND 2.140 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 22 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.