The Stud,plain, cataloged under National Stock Number 5307-00-147-3308, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Dresser, Llc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5307-00-147-3308 |
| Primary Part Number | B2138B |
| Item Name | Stud,plain |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Dresser, Llc |
| Status | ACTIVE |
| Thread Length | 0.625 INCHES MINIMUM STUD THREAD IN |
| Thread Length | 1.062 INCHES MINIMUM NUT THREAD IN |
| Thread Pitch Diameters | +0.3940 TO 0.3960 INCHES STUD 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 | 0.438 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.438 INCHES STUD THREAD IN |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 20 NUT THREAD |
| Thread Quantity Per Inch | 14 STUD THREAD |
| Material | STEEL COMP 8640H |
| Thread Series Designator | UNF 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 |
NSN 5307-00-147-3308 is a Stud,plain, manufactured by Dresser, Llc, classified under FSC 5307, Studs. Status: active.
NSN 5307-00-147-3308 has 3 manufacturer part numbers on file: B2138B (Dresser, Llc), 1AB2138A (Fwd Seagrave Holdings Lp), B2138A (Dresser, Llc).
Key specifications for B2138B: Thread Length: 0.625 INCHES MINIMUM STUD THREAD IN; Thread Length: 1.062 INCHES MINIMUM NUT THREAD IN; Thread Pitch Diameters: +0.3940 TO 0.3960 INCHES STUD THREAD IN; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE. 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.