The Screw,shoulder, cataloged under National Stock Number 5305-01-142-7233, 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 18 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-142-7233 |
| Primary Part Number | HT4008-5-21 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Fastener Length | 1.764 INCHES MINIMUM AND 1.794 INCHES MAXIMUM IN |
| Shoulder Length | 1.176 INCHES MINIMUM AND 1.196 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3271 INCHES MINIMUM AND 0.3276 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.442 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| 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 | 0.625 INCHES MINIMUM AND 0.635 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 |
|---|---|
| HT4008-5-21 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4008-5-21 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4008-5-21 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4008-5-21 | 5/9 Secondary reference U.S. Government activity |
| HT4008-5-21 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| ST3M496-5-21 | 5/2 Secondary reference U.S. Government activity |
| HT4008-5-21 | 3/2 Design control — primary reference U.S. Government activity |
| HT4008-5-21 | 5/9 Secondary reference U.S. Government activity |
| ST3M496-5-21 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5305-01-142-7233 is a Screw,shoulder, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-142-7233 has 3 manufacturer part numbers on file: HT4008-5-21 (Howmet Global Fastening Systems Inc), HT4008-5-21 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4008-5-21 (Hi-Shear Corporation).
Key specifications for HT4008-5-21: Fastener Length: 1.764 INCHES MINIMUM AND 1.794 INCHES MAXIMUM IN; Shoulder Length: 1.176 INCHES MINIMUM AND 1.196 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Diameter: 0.3271 INCHES MINIMUM AND 0.3276 INCHES MAXIMUM FIRST SHOULDER IN. 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.