The Screw,shoulder, cataloged under National Stock Number 5305-01-185-2845, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-185-2845 |
| Primary Part Number | 3M902C6-17D |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.102 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN |
| Fastener Length | 1.687 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN |
| Shoulder Length | 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.405 INCHES MINIMUM AND 0.406 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.102 INCHES MINIMUM AND 0.104 INCHES MAXIMUM 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 |
|---|---|
| HT4020-6-17Y | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M902C6-17D PRIMARY | The Boeing Company Div Defense (USA) |
| HT4020-6-17Y | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4020-6-17Y | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT4020-6-17Y | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4020-6-17Y | 5/2 Secondary reference U.S. Government activity |
| 3M902C6-17D | 5/2 Secondary reference U.S. Government activity |
| HT4020-6-17Y | 5/9 Secondary reference U.S. Government activity |
| HT4020-6-17Y | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-185-2845 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-185-2845 has 3 manufacturer part numbers on file: HT4020-6-17Y (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M902C6-17D (The Boeing Company Div Defense), HT4020-6-17Y (Hi-Shear Corporation).
Key specifications for 3M902C6-17D: Head Height: 0.102 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN; Fastener Length: 1.687 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN; Shoulder Length: 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 19 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.