The Stud,locked in, cataloged under National Stock Number 5307-01-137-7831, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Safran Aerosystems Ex Safran Aerotechnics Plaisir. Government technical data includes 21 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-01-137-7831 |
| Primary Part Number | RZA124-18 |
| Item Name | Stud,locked in |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Safran Aerosystems Ex Safran Aerotechnics Plaisir |
| Status | ACTIVE |
| Thread Tolerance Class | 4A EXTERNAL STUD THREAD A |
| Thread Tolerance Class | 4H EXTERNAL NUT THREAD |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Serrated Portion to Nut End | 56.0 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 1.50 STUD THREAD |
| Thread Pitch in Millimeters | 1.50 NUT THREAD |
| Thread Length | 23.5 MILLIMETERS NOMINAL STUD THREAD MM |
| Thread Length | 41.0 MILLIMETERS NOMINAL NUT THREAD MM |
| Style Designator | LOCKED IN |
| Material Document and Classification | AMS6370 ASSN STD SINGLE MATERIAL RESPONSE |
| Distance From Serrated Portion to End of Stud Thread | 6.0 MILLIMETERS NOMINAL MM |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 16.0 MILLIMETERS NUT THREAD MM |
| Nominal Thread Size | 22.0 MILLIMETERS STUD THREAD MM |
| Distance From Serrated Portion to Stud End | 29.5 MILLIMETERS NOMINAL MM |
| Locking Feature | RING, LOCK SERRATED |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 4130 |
| Thread Series Designator | M STUD THREAD |
| Thread Series Designator | M 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 |
|---|---|
| RZA124-18 | Safran Aerosystems Ex Safran Aerotechnics Plaisir (FRA) |
| Reference | Meaning |
|---|---|
| RZA12418 | 5/9 Secondary reference Safran Aerosystems Ex Safran Aerotechnics Plaisir |
| RZA12418 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5307-01-137-7831 is a Stud,locked in, manufactured by Safran Aerosystems Ex Safran Aerotechnics Plaisir, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-137-7831 has 1 manufacturer part number on file: RZA124-18 (Safran Aerosystems Ex Safran Aerotechnics Plaisir).
Key specifications for RZA124-18: Thread Tolerance Class: 4A EXTERNAL STUD THREAD A; Thread Tolerance Class: 4H EXTERNAL NUT THREAD; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Distance From Serrated Portion to Nut End: 56.0 MILLIMETERS NOMINAL MM. 21 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.