The Stud Assembly,turnlock Fastener, cataloged under National Stock Number 5325-01-173-3776, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc Div Camloc Products. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-173-3776 |
| Primary Part Number | 12S1-20-1BE |
| Item Name | Stud Assembly,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Howmet Global Fastening Systems Inc Div Camloc Products |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-13924,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Eyelet Outside Diameter | 0.344 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN |
| Drive Type | SLOTTED |
| Material Accommodated Thickness | 0.260 INCHES MINIMUM AND 0.274 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE EYELET |
| Material Document and Classification | QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING |
| Material Document and Classification | QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE STUD |
| Material Document and Classification | QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE OR AISI COMP 321 ASSN STD SINGLE MATERIAL RESPONSE OR MIL-W-46078 MIL SPEC SINGLE MATERIAL RESPONSE PIN |
| Diameter | 0.294 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN |
| Securing Device Type | WASHER |
| Distance From Engaging Member to Largest Bearing Surface of Head | 0.564 INCHES NOMINAL IN |
| Turnlock Stud Head Style | FILLISTER |
| Surface Treatment | OXIDE FILM OVERALL |
| Material | STEEL COMP 305 EYELET |
| Material | STEEL COMP 302 STUD |
| Material | STEEL COMP 302 EJECTOR SPRING |
| Material | STEEL CORROSION RESISTING PIN |
| Stud Assembly Style | STUD ASSEMBLY |
| Stud Diameter | 0.122 INCHES MINIMUM AND 0.128 INCHES MAXIMUM 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 |
|---|---|
| 12S1-20-1BE PRIMARY | Howmet Global Fastening Systems Inc Div Camloc Products (USA) |
| 12S1-20-1B PRIMARY | Howmet Global Fastening Systems Inc Div Camloc Products (USA) |
| 12S1-20-1AD PRIMARY | Howmet Global Fastening Systems Inc Div Camloc Products (USA) |
| 9M836-20 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 9M836C20 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5325-01-173-3776 is a Stud Assembly,turnlock Fastener, manufactured by Howmet Global Fastening Systems Inc Div Camloc Products, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-173-3776 has 4 manufacturer part numbers on file: 12S1-20-1BE (Howmet Global Fastening Systems Inc Div Camloc Products), 12S1-20-1B (Howmet Global Fastening Systems Inc Div Camloc Products), 12S1-20-1AD (Howmet Global Fastening Systems Inc Div Camloc Products), 9M836-20 (The Boeing Company Div Defense).
Key specifications for 12S1-20-1BE: Surface Treatment Document and Classification: MIL-C-13924,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Eyelet Outside Diameter: 0.344 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN; Drive Type: SLOTTED; Material Accommodated Thickness: 0.260 INCHES MINIMUM AND 0.274 INCHES MAXIMUM IN. 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.