The Bolt,shoulder, cataloged under National Stock Number 5306-01-476-2404, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Heartland Precision Fasteners Inc. Government technical data includes 16 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-476-2404 |
| Primary Part Number | HP5497-4-29 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 2.209 INCHES NOMINAL IN |
| Shoulder Length | 1.802 INCHES MINIMUM AND 1.822 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.2646 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.397 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.439 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| 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 | X |
| Part Number | Manufacturer |
|---|---|
| HP5497-4-29 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| MB88-4-29 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M497-4-29 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M497-4-29 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| S11-1061-4-29 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| PBF1254-4-29 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB88-4-29 PRIMARY | Hi-Shear Corporation (USA) |
| VAL23607-4-29 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| VS3037-4-29 | 5/9 Secondary reference U.S. Government activity |
| ST3M497-4-29 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 109450-4-29 | 5/9 Secondary reference Sps Technologies Inc |
| BM17019-4-29X | 5/9 Secondary reference U.S. Government activity |
| 109450-4-29 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-476-2404 is a Bolt,shoulder, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-476-2404 has 8 manufacturer part numbers on file: HP5497-4-29 (Heartland Precision Fasteners Inc), MB88-4-29 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M497-4-29 (Fastener Innovation Technology, Inc. Dba F I T), ST3M497-4-29 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), S11-1061-4-29 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries) and 3 more.
Key specifications for HP5497-4-29: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 2.209 INCHES NOMINAL IN; Shoulder Length: 1.802 INCHES MINIMUM AND 1.822 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 16 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.