The Nut,self-Locking,cap, cataloged under National Stock Number 5310-00-948-9987, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc Div Aerospace-South Bend (bendix Dr). Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-948-9987 |
| Primary Part Number | 343456 |
| Item Name | Nut,self-Locking,cap |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Honeywell International Inc Div Aerospace-South Bend (bendix Dr) |
| Status | ACTIVE |
| Width Across Flats | 0.302 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Temp Rating | 250.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | AMS 5640 ASSN STD 1ST MATERIAL RESPONSE NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.297 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE NUT |
| Nut Style | CAP |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | PLASTIC POLYAMIDE NYLON LOCKING INSERT |
| Material | STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 303 PLUS X NUT |
| Material | PLASTIC POLYAMIDE NYLON CAP |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| 343456 PRIMARY | Honeywell International Inc Div Aerospace-South Bend (bendix Dr) (USA) |
| Reference | Meaning |
|---|---|
| 10527900-02 | 7/9 Vendor item drawing reference General Dynamics Information Systems Inc. Dba General Dynamics Advanced Information Systems |
| 79NKM62 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-948-9987 is a Nut,self-Locking,cap, manufactured by Honeywell International Inc Div Aerospace-South Bend (bendix Dr), classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-948-9987 has 1 manufacturer part number on file: 343456 (Honeywell International Inc Div Aerospace-South Bend (bendix Dr)).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-542-2424. Verify interchangeability with system specifications before substitution.
Key specifications for 343456: Width Across Flats: 0.302 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Temp Rating: 250.0 FAHRENHEIT NOMINAL DEGF; Material Document and Classification: AMS 5640 ASSN STD 1ST MATERIAL RESPONSE NUT. 16 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.