The Nut,plain,blind Rivet, cataloged under National Stock Number 5310-01-025-3746, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bollhoff Inc. Dba Bollhoff Rivnut Inc. Government technical data includes 18 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-025-3746 |
| Primary Part Number | S25KB271 |
| Item Name | Nut,plain,blind Rivet |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bollhoff Inc. Dba Bollhoff Rivnut Inc |
| Status | ACTIVE |
| Head Height | 0.089 INCHES MAXIMUM IN |
| Nut Length | 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Head Countersink Angle | 100.00 DEGREES NOMINAL |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Shank End Type | CLOSED |
| Head Style | FLAT COUNTERSUNK REVERSE KEYED |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 0.328 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN |
| Key Length | 0.089 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | BLIND RIVET W/SMOOTH ROUND SHANK |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 1108 OR STEEL COMP 1110 OVERALL |
| Head Diameter | 0.529 INCHES NOMINAL IN |
| 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 |
|---|---|
| S25KB271 PRIMARY | Bollhoff Inc. Dba Bollhoff Rivnut Inc (USA) |
| Reference | Meaning |
|---|---|
| S25KB271 | 3/9 Design control — primary reference Bollhoff Rivnut., Inc. Fastening and Assembly Technology Dba Bollhoff Rivnut., Inc. Div Bollhoff Rivnut., Inc. |
| S25KB271 | 5/9 Secondary reference Bfgoodrich Co the Aerospace Div Engineered Polymer Products |
| 54B7220H58 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-025-3746 is a Nut,plain,blind Rivet, manufactured by Bollhoff Inc. Dba Bollhoff Rivnut Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-025-3746 has 1 manufacturer part number on file: S25KB271 (Bollhoff Inc. Dba Bollhoff Rivnut Inc).
Key specifications for S25KB271: Head Height: 0.089 INCHES MAXIMUM IN; Nut Length: 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL COARSE (UNC). 18 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.