The Bolt,shoulder, cataloged under National Stock Number 5306-01-045-5559, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Reid Products Inc. Dba Reid Products Inc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5306-01-045-5559 |
| Primary Part Number | 11921-4-27 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Reid Products Inc. Dba Reid Products Inc |
| Status | ACTIVE |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 2.069 INCHES MINIMUM AND 2.116 INCHES MAXIMUM IN |
| Shoulder Length | 1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.2802 INCHES MINIMUM AND 0.2807 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-ST3-507 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 |
|---|---|
| 11921-4-27 | Reid Products Inc. Dba Reid Products Inc (USA) |
| S11-1062-4-27 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| MB89-4-27 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 109451-4-27 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HP5507-4-27 | Heartland Precision Fasteners Inc (USA) |
| VAL23608-4-27 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MA5507-4-27 | Abounding Security Inc Div of Maa Corp (USA) |
| BM17019-4-27Y | Huck International, Inc (USA) |
| PBF1366-4-27 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB89-4-27 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 109453-4-27Y | 5/2 Secondary reference U.S. Government activity |
| 109453-4-27Y | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| VS3038-4-27 | 5/9 Secondary reference U.S. Government activity |
| 109450-4-27Y | 5/9 Secondary reference Sps Technologies Inc |
| BM17019-4-27Y | 5/9 Secondary reference U.S. Government activity |
| ST3M507 | D/9 Drawing number reference only The Boeing Company Div Defense |
| ST3M507-4-27 | 3/9 Design control — primary reference The Boeing Company Div Defense |
NSN 5306-01-045-5559 is a Bolt,shoulder, manufactured by Reid Products Inc. Dba Reid Products Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-045-5559 has 10 manufacturer part numbers on file: 11921-4-27 (Reid Products Inc. Dba Reid Products Inc), S11-1062-4-27 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), MB89-4-27 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 109451-4-27 (Sps Technologies, Llc Dba PB Fasteners), HP5507-4-27 (Heartland Precision Fasteners Inc) and 5 more.
2 possible matches (shared part number, not a government interchangeability claim): 5306-01-045-6569, 5306-01-045-6570. Verify interchangeability with system specifications before substitution.
Key specifications for 11921-4-27: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 2.069 INCHES MINIMUM AND 2.116 INCHES MAXIMUM IN; Shoulder Length: 1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.2802 INCHES MINIMUM AND 0.2807 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.