The Bolt,machine, cataloged under National Stock Number 5306-00-121-2889, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Brp Us 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5306-00-121-2889 |
| Primary Part Number | 308752 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Brp Us Inc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.037 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN |
| Head Height | 0.307 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN |
| Fastener Length | 2.406 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ES4 FSCM 32195 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.720 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN |
| Thread Length | 0.750 INCHES MINIMUM IN |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OR AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 1038 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 308752 PRIMARY | Brp Us Inc (USA) |
| Reference | Meaning |
|---|---|
| 308752 | 5/9 Secondary reference Simpson-Lawrence Ltd Johnson and Evi Rude Outboard Motors |
| 308752 | C/1 Advisory reference — outside the item-of-supply concept Evinrude Motors Product Group of Outboard Marine Corp |
| 308752 | 3/9 Design control — primary reference Outboard Marine Corp Johnson Motors Div |
NSN 5306-00-121-2889 is a Bolt,machine, manufactured by Brp Us Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-121-2889 has 1 manufacturer part number on file: 308752 (Brp Us Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-358-8994. Verify interchangeability with system specifications before substitution.
Key specifications for 308752: Extended Washer Thickness: 0.037 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN; Head Height: 0.307 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN; Fastener Length: 2.406 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ES4 FSCM 32195 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 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.