The Screw,shoulder, cataloged under National Stock Number 5305-00-413-6624, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 18 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-413-6624 |
| Primary Part Number | HT41UA13 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.0652 INCHES MINIMUM AND 0.0672 INCHES MAXIMUM IN |
| Fastener Length | 1.265 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN |
| Shoulder Length | 0.701 INCHES MINIMUM AND 0.723 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | MIL-S-5626 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-S-5000 MIL SPEC 2ND TREATMENT RESPONSE OR MIL-S-6049 MIL SPEC 3RD TREATMENT RESPONSE OR MIL-S-6098 MIL SPEC 4TH TREATMENT RESPONSE OR MIL-S-6758 MIL SPEC 5TH TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.2641 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 4130 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.502 INCHES MINIMUM AND 0.507 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 |
|---|---|
| HT41UA13 PRIMARY | Hi-Shear Corporation (USA) |
| HT41UA13 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| HT409A4-13 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| HT41UA13 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M50-4-13 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 54267-4-13 | 3/2 Design control — primary reference U.S. Government activity |
| 54267-4-13 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT409A4-13 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT409A4-13 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-00-413-6624 is a Screw,shoulder, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-413-6624 has 5 manufacturer part numbers on file: HT41UA13 (Hi-Shear Corporation), HT41UA13 (Fairchild Fasteners Europe - Vsd Gmbh), HT409A4-13 (Fairchild Fasteners Europe - Vsd Gmbh), HT41UA13 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M50-4-13 (The Boeing Company Div Defense).
Key specifications for HT41UA13: Head Height: 0.0652 INCHES MINIMUM AND 0.0672 INCHES MAXIMUM IN; Fastener Length: 1.265 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN; Shoulder Length: 0.701 INCHES MINIMUM AND 0.723 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: MIL-S-5626 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-S-5000 MIL SPEC 2ND TREATMENT RESPONSE OR MIL-S-6049 MIL SPEC 3RD TREATMENT RESPONSE OR MIL-S-6098 MIL SPEC 4TH TREATMENT RESPONSE OR MIL-S-6758 MIL SPEC 5TH TREATMENT RESPONSE OVERALL. 18 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.