The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-236-9157, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-236-9157 |
| Primary Part Number | ST3M865-10A1 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Width Across Flats | 0.3130 INCHES MINIMUM AND 0.3150 INCHES MAXIMUM IN |
| Head Height | 0.340 INCHES NOMINAL IN |
| Fastener Length | 2.178 INCHES MINIMUM AND 2.208 INCHES MAXIMUM IN |
| Thread Length | 0.628 INCHES MINIMUM AND 0.678 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM ALL HOLES IN |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.989 INCHES MINIMUM AND 2.029 INCHES MAXIMUM ALL HOLES IN |
| Head Diameter | 0.7995 INCHES MINIMUM AND 0.8000 INCHES MAXIMUM 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 |
|---|---|
| MB178-10 | Hi-Shear Corporation (USA) |
| MB178-10 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 81743 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VS3292-1 | Howmet Global Fastening Systems Inc (USA) |
| ST3M865-10A1 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10113568 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| VS3292-1 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-236-9157 is a Screw,cap,socket Head, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-236-9157 has 5 manufacturer part numbers on file: MB178-10 (Hi-Shear Corporation), MB178-10 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 81743 (Sps Technologies, Llc Dba PB Fasteners), VS3292-1 (Howmet Global Fastening Systems Inc), ST3M865-10A1 (The Boeing Company Div Defense).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-430-1016. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M865-10A1: Width Across Flats: 0.3130 INCHES MINIMUM AND 0.3150 INCHES MAXIMUM IN; Head Height: 0.340 INCHES NOMINAL IN; Fastener Length: 2.178 INCHES MINIMUM AND 2.208 INCHES MAXIMUM IN; Thread Length: 0.628 INCHES MINIMUM AND 0.678 INCHES MAXIMUM IN. 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.