The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-477-6795, 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 14 specifications, cited from the U.S. Government catalog. The record lists 14 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government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 | 5306-01-477-6795 |
| Primary Part Number | ST3M453-3-21 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.130 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Fastener Length | 1.628 INCHES MINIMUM AND 1.674 INCHES MAXIMUM IN |
| 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 | 1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN |
| Width Between Flats | 0.420 INCHES MINIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| 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 |
|---|---|
| MB61-3-21 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BM17019-3-21 | Huck International, Inc (USA) |
| GS1016-3-21 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 11825-3-21 | Reid Products Inc. Dba Reid Products Inc (USA) |
| AIC753-3-21 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 109453-3-21 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| FIT7047-3-21 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HP5453-3-21 | Heartland Precision Fasteners Inc (USA) |
| PBF1253-3-21 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M453-3-21 PRIMARY | The Boeing Company Div Defense (USA) |
| MB61-3-21 | Hi-Shear Corporation (USA) |
| VAL23029-3-21 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| VS3204-3-21 | Howmet Global Fastening Systems Inc (USA) |
| S11-1060-3-21 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| Reference | Meaning |
|---|---|
| KS3020-3-21 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| ST3M453 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 109453-3-21 | 5/2 Secondary reference U.S. Government activity |
| 109453-3-21 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5306-01-477-6795 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-477-6795 has 14 manufacturer part numbers on file: MB61-3-21 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BM17019-3-21 (Huck International, Inc), GS1016-3-21 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), 11825-3-21 (Reid Products Inc. Dba Reid Products Inc), AIC753-3-21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 9 more.
11 possible matches (shared part number, not a government interchangeability claim): 5306-01-477-9644, 5306-01-477-9652, 5306-01-477-9660. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M453-3-21: Head Height: 0.130 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN; Fastener Length: 1.628 INCHES MINIMUM AND 1.674 INCHES MAXIMUM IN; Thread Length: 0.331 INCHES NOMINAL IN; Material Document and Classification: AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 14 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.