The Stud,plain, cataloged under National Stock Number 5307-00-423-9955, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 14 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 | 5307-00-423-9955 |
| Primary Part Number | 6B8638 |
| Item Name | Stud,plain |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Thread Length | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM STUD THREAD IN |
| Thread Length | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM NUT THREAD IN |
| Hardness Rating | 20.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.625 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.625 INCHES STUD THREAD IN |
| Thread Class | 2A STUD THREAD A |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 18 NUT THREAD |
| Thread Quantity Per Inch | 11 STUD THREAD |
| Material | STEEL |
| 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 |
|---|---|
| 6B8638 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5307-00-423-9955 is a Stud,plain, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-423-9955 has 1 manufacturer part number on file: 6B8638 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 6B8638: Thread Length: 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM STUD THREAD IN; Thread Length: 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM NUT THREAD IN; Hardness Rating: 20.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM; Overall Length: 2.865 INCHES MINIMUM AND 2.885 INCHES MAXIMUM IN. 14 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.