The Stud,recessed and Stepped, cataloged under National Stock Number 5307-00-149-5255, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Controls, Inc. Div Actuation Division. Government technical data includes 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-00-149-5255 |
| Primary Part Number | 2143H165 |
| Item Name | Stud,recessed and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Curtiss-Wright Controls, Inc. Div Actuation Division |
| Status | ACTIVE |
| Thread Length | 0.430 INCHES MINIMUM AND 0.470 INCHES MAXIMUM STUD THREAD IN |
| Thread Length | 0.510 INCHES MINIMUM AND 0.570 INCHES MAXIMUM NUT THREAD IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Style Designator | RECESSED AND STEPPED |
| Thread Pitch Diameters | +0.2847 TO 0.2857 INCHES STUD THREAD IN |
| Material Document and Classification | AMS 6320 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6382 ASSN STD 2ND MATERIAL RESPONSE |
| Diameter of Recessed Portion of Shank | 0.180 INCHES MINIMUM AND 0.184 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.250 INCHES NUT THREAD IN |
| Length of Recessed Portion of Shank | 0.430 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A NUT THREAD A |
| Thread Quantity Per Inch | 28 NUT THREAD |
| Material | STEEL COMP 8735 OR STEEL COMP 4140 |
| Distance Across Flats | 0.200 INCHES NOMINAL IN |
| Thread Series Designator | UNS 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 |
|---|---|
| 2143H165 PRIMARY | Curtiss-Wright Controls, Inc. Div Actuation Division (USA) |
NSN 5307-00-149-5255 is a Stud,recessed and Stepped, manufactured by Curtiss-Wright Controls, Inc. Div Actuation Division, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-149-5255 has 1 manufacturer part number on file: 2143H165 (Curtiss-Wright Controls, Inc. Div Actuation Division).
Key specifications for 2143H165: Thread Length: 0.430 INCHES MINIMUM AND 0.470 INCHES MAXIMUM STUD THREAD IN; Thread Length: 0.510 INCHES MINIMUM AND 0.570 INCHES MAXIMUM NUT THREAD IN; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM; Style Designator: RECESSED AND STEPPED. 17 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.