The Nut,plain,slotted,hexagon, cataloged under National Stock Number 5310-01-135-4153, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-135-4153 |
| Primary Part Number | H52351-5 |
| Item Name | Nut,plain,slotted,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Width Across Flats | 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE AND QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE AND 2396,FSCM 76301 MFR REF 2ND TREATMENT RESPONSE OVERALL2396,FSCM 76301 MFR REF 2ND TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF)UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALLAMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES0.312 INCHES IN |
| Nut Height | 0.240 INCHES MINIMUM AND 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM0.260 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALLPASSIVATE OVERALL |
| Countersink Angle | 110.0 DEGREES NOMINAL NUT110.0 DEGREES NOMINAL NUT |
| Nut Style | SLOTTED, HEXAGONSLOTTED, HEXAGON |
| Thread Class | 3B3B |
| Thread Quantity Per Inch | 2424 |
| Material | IRON ALLOY 660 OVERALL |
| Bearing Surface Type | WASHER FACEDWASHER FACED |
| 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 |
|---|---|
| H52351-5 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 79537-524 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 3M891-5 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| AD3M891-5 | 5/2 Secondary reference U.S. Government activity |
| 10109724 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-135-4153 is a Nut,plain,slotted,hexagon, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-135-4153 has 2 manufacturer part numbers on file: H52351-5 (Howmet Global Fastening Systems Inc), 79537-524 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for H52351-5: Width Across Flats: 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE AND QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE AND 2396,FSCM 76301 MFR REF 2ND TREATMENT RESPONSE OVERALL2396,FSCM 76301 MFR REF 2ND TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF)UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALLAMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 14 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.