The Nut,self-Locking,plate, cataloged under National Stock Number 5310-00-891-9402, 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 19 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through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-891-9402 |
| Primary Part Number | MK3000-3 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Plate Thickness | 0.037 INCHES MAXIMUM IN |
| Nut Length | 0.526 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | C-1042,FSCM 77445 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Distance From Aperture Center to Mounting Hole Center | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.208 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL 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 |
|---|---|
| MK3000-3 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 578322 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 578311 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 578321 | 5/9 Secondary reference Sps Technologies Inc |
| 578311 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 578320 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 578322 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 578322 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| M12620-02 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 578321 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 578321 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| M12620-02 | 3/2 Design control — primary reference U.S. Government activity |
| MK3000-3 | 5/9 Secondary reference Klx Aerospace Solutions II SAS |
| RMD52LHTA55M02 | 5/9 Secondary reference Harvard Industries Inc |
| MK3000-3 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
| 578320 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 5310-00-891-9402 is a Nut,self-Locking,plate, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-891-9402 has 2 manufacturer part numbers on file: MK3000-3 (Howmet Global Fastening Systems Inc), 578322 (Howmet Global Fastening Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-182-6851. Verify interchangeability with system specifications before substitution.
Key specifications for MK3000-3: Plate Thickness: 0.037 INCHES MAXIMUM IN; Nut Length: 0.526 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNF. 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.