The Receptacle,turnlock Fastener, cataloged under National Stock Number 5325-00-521-4656, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-521-4656 |
| Primary Part Number | 3M304-6-9-01 |
| Item Name | Receptacle,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Receptacle Overall Length | 1.295 INCHES MAXIMUM IN |
| Receptacle Thread Size and Series/type Designator | 0.250-28 UNF |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Center to Center Distance Between Mounting Holes | 0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN |
| Mounting Style | PLAIN W/MOUNTING HOLE |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE BARREL |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE STUD |
| Turnlock Receptacle Style | RECEPTACLE |
| Receptacle Width | 0.600 INCHES MAXIMUM IN |
| Turnlock Mounting Hole Diameter | 0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Receptacle Height | 0.771 INCHES NOMINAL IN |
| Material | STEEL COMP 8740 BARREL |
| Material | STEEL COMP 1050 RETAINER |
| Material | STEEL COMP 8740 STUD |
| 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 |
|---|---|
| 3M304-6-9-01 | The Boeing Company Div Defense (USA) |
| 1950-6-9-01 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| Reference | Meaning |
|---|---|
| 3M304-6-9-01 | 5/2 Secondary reference U.S. Government activity |
| 1950-6-9-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5325-00-521-4656 is a Receptacle,turnlock Fastener, manufactured by The Boeing Company Div Defense, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-521-4656 has 2 manufacturer part numbers on file: 3M304-6-9-01 (The Boeing Company Div Defense), 1950-6-9-01 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok).
1 possible match (shared part number, not a government interchangeability claim): 5325-00-943-5511. Verify interchangeability with system specifications before substitution.
Key specifications for 3M304-6-9-01: Receptacle Overall Length: 1.295 INCHES MAXIMUM IN; Receptacle Thread Size and Series/type Designator: 0.250-28 UNF; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Center to Center Distance Between Mounting Holes: 0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN. 15 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.