The Nut,plain,round, cataloged under National Stock Number 5310-01-178-3321, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Goodrich Corporation. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-178-3321 |
| Primary Part Number | 1881-129 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Goodrich Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | CPC8225,13002 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Surface Treatment Document and Classification | MIL-C-83286 COLOR 17875 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-P-23377 MIL SPEC 2ND TREATMENT RESPONSE OVERALL EXCEPT THREADS |
| Thread Series | UNF |
| Material Document and Classification | MIL-S-8844 CL3,300M MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.440 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 3.125 INCHES IN |
| Nut Diameter | 4.380 INCHES NOMINAL IN |
| Drive Point Depth | 0.312 INCHES NOMINAL IN |
| Undercut Thickness | 0.648 INCHES NOMINAL IN |
| Nut Thickness | 0.960 INCHES NOMINAL IN |
| Small End Diameter | 3.620 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM AND TITANIUM OVERALL |
| Surface Treatment | ENAMEL AND PRIMER OVERALL EXCEPT THREADS |
| Drive Point Quantity | 6 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 1881-129 PRIMARY | Goodrich Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1881-129 | 3/9 Design control — primary reference Goodrich Corporation Div Advanced Structures Landing Systems |
NSN 5310-01-178-3321 is a Nut,plain,round, manufactured by Goodrich Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-178-3321 has 1 manufacturer part number on file: 1881-129 (Goodrich Corporation).
Key specifications for 1881-129: Surface Treatment Document and Classification: CPC8225,13002 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Surface Treatment Document and Classification: MIL-C-83286 COLOR 17875 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-P-23377 MIL SPEC 2ND TREATMENT RESPONSE OVERALL EXCEPT THREADS; Thread Series: UNF; Material Document and Classification: MIL-S-8844 CL3,300M MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.