The Stud,locked in, cataloged under National Stock Number 5307-00-628-7401, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Microdot Products. Government technical data includes 15 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-00-628-7401 |
| Primary Part Number | 5144B-4SDA-0938 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Microdot Products |
| Status | ACTIVE |
| Thread Length | 0.500 INCHES NOMINAL NUT THREAD IN |
| Thread Length | 0.393 INCHES NOMINAL STUD THREAD IN |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.375 INCHES STUD THREAD IN |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A NUT THREAD A |
| Thread Class | 3A STUD THREAD A |
| Thread Quantity Per Inch | 16 STUD THREAD |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Material | STEEL COMP 416 |
| Thread Series Designator | UNF NUT THREAD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| 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 |
|---|---|
| 5144B-4SDA-0938 PRIMARY | Howmet Global Fastening Systems Inc. Div Microdot Products (USA) |
| 69544-14-15 | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| 5144B-4SDA-15 PRIMARY | Howmet Global Fastening Systems Inc. Div Microdot Products (USA) |
| Reference | Meaning |
|---|---|
| 5144B-4SDA-15 | 5/9 Secondary reference Stanley Engineered Fastening Llc |
| SL9324-14-16 | 5/9 Secondary reference U.S. Government activity |
| MSS1610-2 | 5/1 Secondary reference Hamilton Sundstrand Corporation Dba Collins Aerospace |
| SL9324-14-15 | 5/2 Secondary reference U.S. Government activity |
NSN 5307-00-628-7401 is a Stud,locked in, manufactured by Howmet Global Fastening Systems Inc. Div Microdot Products, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-628-7401 has 3 manufacturer part numbers on file: 5144B-4SDA-0938 (Howmet Global Fastening Systems Inc. Div Microdot Products), 69544-14-15 (Hamilton Sundstrand Corporation Dba Collins Aerospace), 5144B-4SDA-15 (Howmet Global Fastening Systems Inc. Div Microdot Products).
3 possible matches (shared part number, not a government interchangeability claim): 5307-00-628-7459, 5325-00-651-0211, 5307-00-651-3842. Verify interchangeability with system specifications before substitution.
Key specifications for 5144B-4SDA-0938: Thread Length: 0.500 INCHES NOMINAL NUT THREAD IN; Thread Length: 0.393 INCHES NOMINAL STUD THREAD IN; Material Document and Classification: AISI ASSN STD SINGLE MATERIAL RESPONSE; Thread Direction: RIGHT-HAND STUD THREAD. 15 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.