The Stud,recessed and Stepped, cataloged under National Stock Number 5307-00-353-2518, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Hme, Inc. Dba Hme Ahrens-Fox. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5307-00-353-2518 |
| Primary Part Number | 20X150 |
| Item Name | Stud,recessed and Stepped |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Hme, Inc. Dba Hme Ahrens-Fox |
| Status | ACTIVE |
| Thread Length | 1.156 INCHES MINIMUM STUD THREAD IN |
| Thread Length | 1.218 INCHES MINIMUM NUT THREAD IN |
| Hardness Rating | 18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM |
| Thread Pitch Diameters | +0.7044 TO 0.7084 INCHES STUD THREAD IN |
| Thread Pitch Diameters | +1.0764 TO 1.0804 INCHES NUT THREAD IN |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.750 INCHES STUD THREAD IN |
| Nominal Thread Size | 1.125 INCHES NUT THREAD IN |
| Surface Treatment | CADMIUM AND ZINC OVERALL |
| Thread Quantity Per Inch | 16 NUT THREAD |
| Thread Quantity Per Inch | 16 STUD THREAD |
| Material | STEEL COMP 4427 |
| Thread Series Designator | UNS NUT THREAD |
| 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 |
|---|---|
| 20X150 | Meritor Heavy Vehicle Systems, Llc (USA) |
| 20X150 PRIMARY | Hme, Inc. Dba Hme Ahrens-Fox (USA) |
| Reference | Meaning |
|---|---|
| 31781-2 | 5/9 Secondary reference Alliedsignal Inc Alliedsignal Braking Systems-Wheel End Products |
| 31781 | 5/9 Secondary reference Alliedsignal Inc Alliedsignal Braking Systems-Wheel End Products |
NSN 5307-00-353-2518 is a Stud,recessed and Stepped, manufactured by Hme, Inc. Dba Hme Ahrens-Fox, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-353-2518 has 2 manufacturer part numbers on file: 20X150 (Meritor Heavy Vehicle Systems, Llc), 20X150 (Hme, Inc. Dba Hme Ahrens-Fox).
2 possible matches (shared part number, not a government interchangeability claim): 5977-00-441-9322, 2810-01-102-0113. Verify interchangeability with system specifications before substitution.
Key specifications for 20X150: Thread Length: 1.156 INCHES MINIMUM STUD THREAD IN; Thread Length: 1.218 INCHES MINIMUM NUT THREAD IN; Hardness Rating: 18.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM; Thread Pitch Diameters: +0.7044 TO 0.7084 INCHES STUD THREAD IN. 16 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.