The Stud,shouldered, cataloged under National Stock Number 5307-01-321-3657, is classified within Federal Supply Class 5307 (Studs) of the Hardware and Abrasives group. The manufacturer of record is Accurate Screw Machine Corp Div Accurate Screw Machine Corporation. Government technical data includes 19 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 | 5307-01-321-3657 |
| Primary Part Number | 20520-H-SS-4.00-12 |
| Item Name | Stud,shouldered |
| FSC / FSG | 5307 / 53 — Studs |
| Manufacturer | Accurate Screw Machine Corp Div Accurate Screw Machine Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.292 INCHES MINIMUM AND 0.332 INCHES MAXIMUM STUD THREAD IN |
| Thread Length | 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM NUT THREAD IN |
| Style Designator | SHOULDERED |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND STUD THREAD |
| Thread Direction | RIGHT-HAND NUT THREAD |
| Nominal Thread Size | 0.190 INCHES NUT THREAD IN |
| Nominal Thread Size | 0.190 INCHES STUD THREAD IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A STUD THREAD A |
| Thread Class | 2A NUT THREAD A |
| Thread Quantity Per Inch | 32 STUD THREAD |
| Thread Quantity Per Inch | 32 NUT THREAD |
| Material | STEEL COMP 303 |
| Distance Across Flats | 0.312 INCHES NOMINAL IN |
| Shoulder Length | 3.188 INCHES NOMINAL IN |
| Thread Series Designator | UNF STUD THREAD |
| Thread Series Designator | UNF NUT 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 |
|---|---|
| 20520-H-SS-4.00-12 PRIMARY | Accurate Screw Machine Corp Div Accurate Screw Machine Corporation (USA) |
NSN 5307-01-321-3657 is a Stud,shouldered, manufactured by Accurate Screw Machine Corp Div Accurate Screw Machine Corporation, classified under FSC 5307, Studs. Status: active.
NSN 5307-01-321-3657 has 1 manufacturer part number on file: 20520-H-SS-4.00-12 (Accurate Screw Machine Corp Div Accurate Screw Machine Corporation).
Key specifications for 20520-H-SS-4.00-12: Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.292 INCHES MINIMUM AND 0.332 INCHES MAXIMUM STUD THREAD IN; Thread Length: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM NUT THREAD IN; Style Designator: SHOULDERED. 19 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.