The Stud Assembly,turnlock Fastener, cataloged under National Stock Number 5325-00-451-0227, 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 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-451-0227 |
| Primary Part Number | 12S1-20-1BB |
| 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-S-5002 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 | AISI,TYPE 321 ASSN STD 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 | 0.403 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN |
| Turnlock Stud Head Style | FILLISTER |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 305 EYELET |
| Material | STEEL PIN |
| Material | STEEL COMP 302 STUD |
| Material | STEEL COMP 302 EJECTOR SPRING |
| 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 |
|---|---|
| 12S1-20-1BB PRIMARY | Howmet Global Fastening Systems Inc Div Camloc Products (USA) |
| Reference | Meaning |
|---|---|
| 530922-66 | 7/2 Vendor item drawing reference U.S. Government activity |
| 0073-503 | C/1 Advisory reference — outside the item-of-supply concept Microwave Engineering Corporation |
| 0073-503 | 5/9 Secondary reference U.S. Government activity |
NSN 5325-00-451-0227 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 5325-00-451-0227 has 1 manufacturer part number on file: 12S1-20-1BB (Howmet Global Fastening Systems Inc Div Camloc Products).
Key specifications for 12S1-20-1BB: Surface Treatment Document and Classification: MIL-S-5002 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. 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.