The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-265-1190, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Timken Gears & Services Inc. Div Philadelphia Gear. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-265-1190 |
| Primary Part Number | 771A176-232 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Timken Gears & Services Inc. Div Philadelphia Gear |
| Status | ACTIVE |
| Width Across Flats | 0.500 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN |
| Head Height | 0.616 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Fastener Length | 2.500 INCHES NOMINAL IN |
| Thread Length | 1.437 INCHES NOMINAL IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | C1A2 CAGEC 01289 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.863 INCHES MINIMUM AND 0.875 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 |
|---|---|
| 771A176-232 PRIMARY | Timken Gears & Services Inc. Div Philadelphia Gear (USA) |
| Reference | Meaning |
|---|---|
| 771A176-232 | 5/9 Secondary reference General Electric Company |
NSN 5305-01-265-1190 is a Screw,cap,socket Head, manufactured by Timken Gears & Services Inc. Div Philadelphia Gear, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-265-1190 has 1 manufacturer part number on file: 771A176-232 (Timken Gears & Services Inc. Div Philadelphia Gear).
Key specifications for 771A176-232: Width Across Flats: 0.500 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN; Head Height: 0.616 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN; Fastener Length: 2.500 INCHES NOMINAL IN; Thread Length: 1.437 INCHES NOMINAL IN. 15 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.