The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-145-6956, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-145-6956 |
| Primary Part Number | A0L4160-303 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners |
| Status | ACTIVE |
| Width Across Flats | 0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN |
| Head Height | 0.109 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN |
| Fastener Length | 0.468 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OR QQ-S-365 TYPE 1 OR TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OR QQ-S-365 TYPE 1 OR TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE TOP OF HEAD |
| Surface Treatment Document and Classification | QQ-P-35 TYPE 1 OR TYPE 2 OR TYPE 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Precious Material | SILVER |
| Thread Length | 0.296 INCHES MINIMUM AND 0.331 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Surface Treatment | SILVER BEARING SURFACE OF HEAD |
| Surface Treatment | SILVER TOP OF HEAD |
| Precious Material and Location | BEARING SURFACE AND TOP OF HEAD SILVER |
| Internal Drive Style | HEXAGON |
| Countersink Angle | 20.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.153 INCHES MINIMUM AND 0.157 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 |
|---|---|
| 81601-303 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 965807-303 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 965807-303 | All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners (USA) |
| A0L4160-303 PRIMARY | All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners (USA) |
| AIC209S-303 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 965807-303 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| 965807-303 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5305-01-145-6956 is a Screw,cap,socket Head, manufactured by All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-145-6956 has 6 manufacturer part numbers on file: 81601-303 (Sps Technologies, Llc Dba PB Fasteners), 965807-303 (Sps Technologies, Llc Dba PB Fasteners), 965807-303 (All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners), A0L4160-303 (All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners), AIC209S-303 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 1 more.
Key specifications for A0L4160-303: Width Across Flats: 0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN; Head Height: 0.109 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN; Fastener Length: 0.468 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OR QQ-S-365 TYPE 1 OR TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD. 23 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.