The Stud,locked in, cataloged under National Stock Number 5307-01-340-5128, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-340-5128 |
| Primary Part Number | MS51989E303-7 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Serrated Portion to Nut End | 0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN |
| Thread Length | 0.215 INCHES MINIMUM AND 0.245 INCHES MAXIMUM STUD THREAD IN |
| Thread Length | 0.395 INCHES MINIMUM AND 0.425 INCHES MAXIMUM NUT THREAD IN |
| Hardness Rating | 269.0 BRINELL STANDARD NOMINAL |
| Style Designator | LOCKED IN |
| Thread Pitch Diameters | +0.1639 TO 0.1654 INCHES STUD THREAD IN |
| Material Document and Classification | AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE |
| Distance From Serrated Portion to End of Stud Thread | 0.135 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN |
| Serration Included Angle | 89.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.190 INCHES STUD THREAD IN |
| Nominal Thread Size | 0.164 INCHES NUT THREAD IN |
| Distance From Serrated Portion to Stud End | 0.365 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN |
| Locking Feature | RING, LOCK SERRATED |
| Serration Quantity | 16 |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 32 NUT THREAD |
| Thread Quantity Per Inch | 24 STUD THREAD |
| Material | IRON ALLOY 660 |
| Thread Series Designator | UNS STUD THREAD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) NUT 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 |
|---|---|
| MS51989E303-7 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| MS51989E303-7 | 3/9 Design control — primary reference U.S. Government activity |
| MS51989E303-7 | 5/9 Secondary reference U.S. Government activity |
NSN 5307-01-340-5128 is a Stud,locked in, manufactured by Sae International Dba Sae International, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-340-5128 has 1 manufacturer part number on file: MS51989E303-7 (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 5307-01-354-3774. Verify interchangeability with system specifications before substitution.
Key specifications for MS51989E303-7: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Distance From Serrated Portion to Nut End: 0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN; Thread Length: 0.215 INCHES MINIMUM AND 0.245 INCHES MAXIMUM STUD THREAD IN; Thread Length: 0.395 INCHES MINIMUM AND 0.425 INCHES MAXIMUM NUT THREAD IN. 24 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.