The Nut Spacer,plate, cataloged under National Stock Number 5310-00-283-7550, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Kettenburg Marine. Government technical data includes 13 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-283-7550 |
| Primary Part Number | ST4M164 |
| Item Name | Nut Spacer,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Kettenburg Marine |
| Status | ACTIVE |
| Plate Thickness | 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN |
| Nut Length | 1.810 INCHES MINIMUM AND 1.840 INCHES MAXIMUM IN |
| Plate Width | 0.935 INCHES MINIMUM AND 0.965 INCHES MAXIMUM IN |
| Mounting Hole Arrangement Style | 2 HOLES |
| Material Document and Classification | MIL-S-6721 MIL SPEC 1ST MATERIAL RESPONSE OR QQ-S-763 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Mounting Hole Diameter | 0.127 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN |
| Distance From Aperture Center to Mounting Hole Center | 0.747 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN |
| Center to Center Distance Between Mounting Holes Along Length | 0.310 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Thru-Hole Diameter | 0.437 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | PLATE NUT SPACER |
| Material | STEEL CORROSION RESISTING OVERALL |
| Nut Mounting Provision | STRAIGHT HOLES |
| 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 |
|---|---|
| ST4M164 PRIMARY | Kettenburg Marine (USA) |
| ST4M164A7L | The Boeing Company Div Defense (USA) |
NSN 5310-00-283-7550 is a Nut Spacer,plate, manufactured by Kettenburg Marine, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-283-7550 has 2 manufacturer part numbers on file: ST4M164 (Kettenburg Marine), ST4M164A7L (The Boeing Company Div Defense).
Key specifications for ST4M164: Plate Thickness: 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN; Nut Length: 1.810 INCHES MINIMUM AND 1.840 INCHES MAXIMUM IN; Plate Width: 0.935 INCHES MINIMUM AND 0.965 INCHES MAXIMUM IN; Mounting Hole Arrangement Style: 2 HOLES. 13 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.