The Screw,shoulder, cataloged under National Stock Number 5305-01-263-0842, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-263-0842 |
| Primary Part Number | HT4020-5-6AY |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Fastener Length | 0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN |
| Shoulder Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.3427 INCHES MINIMUM AND 0.3432 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT AND O RING |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE FASTENER |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| 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 FASTENER |
| Material | RUBBER SILICONE CLASS Q RING |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.629 INCHES MINIMUM AND 0.634 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 |
|---|---|
| HT4020-5-6AY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4020-5-6AY PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 11879C5-6A | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M902C5-6A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4020-5-6AY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4020-5-6AY | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 3M902C5-6A | 5/2 Secondary reference U.S. Government activity |
| HT4020-5-6AY | 5/9 Secondary reference U.S. Government activity |
| 3M902C5-6A | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4020-5-6AY | 5/2 Secondary reference U.S. Government activity |
| HT4020-5-6AY | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-263-0842 is a Screw,shoulder, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-263-0842 has 5 manufacturer part numbers on file: HT4020-5-6AY (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4020-5-6AY (Howmet Global Fastening Systems Inc), 11879C5-6A (Reid Products Inc. Dba Reid Products Inc), 3M902C5-6A (Fastener Innovation Technology, Inc. Dba F I T), HT4020-5-6AY (Hi-Shear Corporation).
Key specifications for HT4020-5-6AY: Fastener Length: 0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN; Shoulder Length: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.3427 INCHES MINIMUM AND 0.3432 INCHES MAXIMUM FIRST SHOULDER IN; Thread Length: 0.505 INCHES MINIMUM AND 0.572 INCHES MAXIMUM 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.