The Stud,plain, cataloged under National Stock Number 5307-00-423-9987, 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 16 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 | 5307-00-423-9987 |
| Primary Part Number | 6B9551 |
| Item Name | Stud,plain |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Cotter Pin Hole Diameter | 0.109 INCHES NOMINAL FIRST HOLE IN |
| Thread Length | 0.500 INCHES MINIMUM STUD THREAD IN |
| Thread Length | 0.688 INCHES MINIMUM NUT THREAD IN |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.375 INCHES STUD THREAD IN |
| Nominal Thread Size | 0.375 INCHES NUT THREAD IN |
| Thread Class | 2A STUD THREAD A |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 24 NUT THREAD |
| Thread Quantity Per Inch | 16 STUD THREAD |
| Material | STEEL |
| Thread Series Designator | UNF NUT THREAD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| Distance From Cotter Pin Hole Centerline to Nut End | 0.219 INCHES NOMINAL FIRST HOLE IN |
| 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 |
|---|---|
| 6B9551 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5307-00-423-9987 is a Stud,plain, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-423-9987 has 1 manufacturer part number on file: 6B9551 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 6B9551: Cotter Pin Hole Diameter: 0.109 INCHES NOMINAL FIRST HOLE IN; Thread Length: 0.500 INCHES MINIMUM STUD THREAD IN; Thread Length: 0.688 INCHES MINIMUM NUT THREAD IN; Hardness Rating: 24.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM. 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.