The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-134-0199, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 15 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-134-0199 |
| Primary Part Number | MB154-8D32 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN |
| Fastener Length | 2.443 INCHES MINIMUM AND 2.463 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.433 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.990 INCHES MINIMUM AND 2.010 INCHES MAXIMUM IN |
| Width Between Flats | 0.774 INCHES MINIMUM AND 0.782 INCHES MAXIMUM IN |
| Grip Diameter | 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.318 INCHES MINIMUM AND 2.348 INCHES MAXIMUM ALL HOLES 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 |
|---|---|
| ST3M744-8D32 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| VS3174-8D32 | Huck International, Inc (USA) |
| WC744-8D32 | West Coast Aerospace, Inc. (USA) |
| ST3M744-8D32 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| VCG0001-8D32 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| SLB748-8D32 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| AIC687-8D32 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GS1015-8D32 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M744-8D32 | Heartland Precision Fasteners Inc (USA) |
| 11823-8D32 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 122895-8D32 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VS3174-8D32 | Howmet Global Fastening Systems Inc (USA) |
| PBF1265-8D32 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB154-8D32 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M744-8D32 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| VS3174-8D32 | 5/2 Secondary reference U.S. Government activity |
| S406-8D32 | 5/9 Secondary reference U.S. Government activity |
| 10115928 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| S406-8D32 | 5/9 Secondary reference Huck International, Inc |
| 122895-8D32 | 5/2 Secondary reference U.S. Government activity |
| ST3M744-8D32 | 5/9 Secondary reference Houston Precision Fasteners I Lp |
NSN 5306-01-134-0199 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-134-0199 has 15 manufacturer part numbers on file: ST3M744-8D32 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), VS3174-8D32 (Huck International, Inc), WC744-8D32 (West Coast Aerospace, Inc.), ST3M744-8D32 (Fastener Innovation Technology, Inc. Dba F I T), VCG0001-8D32 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 10 more.
Key specifications for MB154-8D32: Head Height: 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN; Fastener Length: 2.443 INCHES MINIMUM AND 2.463 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.433 INCHES MINIMUM AND 0.473 INCHES MAXIMUM 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.