The Screw,shoulder, cataloged under National Stock Number 5305-01-239-1324, 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 4 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-239-1324 |
| Primary Part Number | 3M902C7-17A |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.118 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Fastener Length | 1.703 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN |
| Shoulder Length | 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.4677 INCHES MINIMUM AND 0.4682 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.631 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.437 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.881 INCHES MINIMUM AND 0.888 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 |
|---|---|
| 11879C7-17A | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4020-7-17AY | Hi-Shear Corporation (USA) |
| 3M902C7-17A PRIMARY | The Boeing Company Div Defense (USA) |
| HT4020-7-17AY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| 3M902C7-17A | 5/2 Secondary reference U.S. Government activity |
| HT4020-7-17AY | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4020-7-17AY | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT4020-7-17AY | 5/9 Secondary reference U.S. Government activity |
| 3M902C7-17A | 5/2 Secondary reference U.S. Government activity |
| HT4020-7-17AY | 5/9 Secondary reference U.S. Government activity |
| HT4020-7-17AY | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-239-1324 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-239-1324 has 4 manufacturer part numbers on file: 11879C7-17A (Reid Products Inc. Dba Reid Products Inc), HT4020-7-17AY (Hi-Shear Corporation), 3M902C7-17A (The Boeing Company Div Defense), HT4020-7-17AY (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for 3M902C7-17A: Head Height: 0.118 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN; Fastener Length: 1.703 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN; Shoulder Length: 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.4677 INCHES MINIMUM AND 0.4682 INCHES MAXIMUM FIRST SHOULDER IN. 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.