The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-377-7278, 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 19 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-377-7278 |
| Primary Part Number | ST3M753-4-24 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.162 INCHES MINIMUM AND 0.182 INCHES MAXIMUM IN |
| Head Height | 0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN |
| Fastener Length | 1.982 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.470 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN |
| Thread Length | 0.298 INCHES MINIMUM AND 0.399 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.500 INCHES NOMINAL IN |
| Head Minor Diameter | 0.297 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Grip Diameter | 0.2480 INCHES MINIMUM AND 0.2485 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| AIC763-4-24 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VFK600-4-24 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB156-4-24 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M753-4-24 PRIMARY | The Boeing Company Div Defense (USA) |
| 11829-4-24 | Reid Products Inc. Dba Reid Products Inc (USA) |
| PBF 1267 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB156-4-24 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| VS3190-4-24 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| VS3190-4-24 | 5/2 Secondary reference U.S. Government activity |
| 12897-4-24 | 5/2 Secondary reference U.S. Government activity |
| S343-4-24 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 10116274 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| S343-4-24 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-377-7278 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-377-7278 has 7 manufacturer part numbers on file: AIC763-4-24 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), VFK600-4-24 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), MB156-4-24 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M753-4-24 (The Boeing Company Div Defense), 11829-4-24 (Reid Products Inc. Dba Reid Products Inc) and 2 more.
Key specifications for ST3M753-4-24: Extended Washer Thickness: 0.162 INCHES MINIMUM AND 0.182 INCHES MAXIMUM IN; Head Height: 0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN; Fastener Length: 1.982 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 19 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.