The Bolt,shoulder, cataloged under National Stock Number 5306-01-044-2962, 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 15 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through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-044-2962 |
| Primary Part Number | HP5497-4-18 |
| 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 | 1.506 INCHES MINIMUM AND 1.553 INCHES MAXIMUM IN |
| Shoulder Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-497 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL 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 |
|---|---|
| HP5497-4-18 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| ST3M497-4-18 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB88-4-18 PRIMARY | Hi-Shear Corporation (USA) |
| MB88-4-18 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M497-4-18 | J M Precision Inc (USA) |
| PBF1254-4-18 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| S11-1061-4-18 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| VAL23607-4-18 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| ST3M497-4-18 | 5/2 Secondary reference U.S. Government activity |
| VS3037-4-18 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| 109453-4-18X | 5/9 Secondary reference U.S. Government activity |
| 109450-4-18 | 3/2 Design control — primary reference U.S. Government activity |
| BM17019-4-18X | 5/9 Secondary reference U.S. Government activity |
| MA5497-4-18 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| BM17019-4-18X | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| VS3037-4-18 | 5/9 Secondary reference U.S. Government activity |
| ST3M497-4-18 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| ST3M497-4-18 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 109453-4-18X | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5306-01-044-2962 is a Bolt,shoulder, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-044-2962 has 8 manufacturer part numbers on file: HP5497-4-18 (Heartland Precision Fasteners Inc), ST3M497-4-18 (Sps Technologies, Llc Dba PB Fasteners), MB88-4-18 (Hi-Shear Corporation), MB88-4-18 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M497-4-18 (J M Precision Inc) and 3 more.
Key specifications for HP5497-4-18: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 1.506 INCHES MINIMUM AND 1.553 INCHES MAXIMUM IN; Shoulder Length: 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN. 15 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.