The Screw,shoulder, cataloged under National Stock Number 5305-01-285-7725, 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 20 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-285-7725 |
| Primary Part Number | 3M902C3-8A |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.032 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN |
| Fastener Length | 0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN |
| Shoulder Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Features Provided | DRY FILM LUBRICANT AND O RING |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 1250000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.3765 INCHES MINIMUM AND 0.3813 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 |
|---|---|
| 3M902C3-8A PRIMARY | The Boeing Company Div Defense (USA) |
| HT4020-3-8AY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M902C3-8A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4020-3-8AY | Howmet Global Fastening Systems Inc (USA) |
| HT4020-3-8AY | Huck International, Inc (USA) |
| HT4020-3-8AY | West Coast Aerospace, Inc. (USA) |
| HT4020-3-8AY | Hi-Shear Corporation (USA) |
| 11879C3-8A | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| CHT4020-3-8AY | C/1 Advisory reference — outside the item-of-supply concept Deutsch Co the |
| CHT4020-3-8AY | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| HT4020-3-8AY | 5/2 Secondary reference U.S. Government activity |
| CHT4020-3-8AY | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5305-01-285-7725 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-285-7725 has 8 manufacturer part numbers on file: 3M902C3-8A (The Boeing Company Div Defense), HT4020-3-8AY (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M902C3-8A (Fastener Innovation Technology, Inc. Dba F I T), HT4020-3-8AY (Howmet Global Fastening Systems Inc), HT4020-3-8AY (Huck International, Inc) and 3 more.
Key specifications for 3M902C3-8A: Head Height: 0.032 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN; Fastener Length: 0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN; Shoulder Length: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN. 20 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.