The Screw,close Tolerance, cataloged under National Stock Number 5305-01-433-4092, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-433-4092 |
| Primary Part Number | 3M1231-1 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Head Height | 0.080 INCHES MINIMUM AND 0.093 INCHES MAXIMUM IN |
| Fastener Length | 2.157 INCHES NOMINAL IN |
| Thread Length | 0.577 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.570 INCHES MINIMUM AND 1.590 INCHES MAXIMUM IN |
| Width Between Flats | 0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN |
| Grip Diameter | 0.115 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNJC |
| 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 |
|---|---|
| 3M1231-1 | Howmet Global Fastening Systems Inc (USA) |
| 3M1231-1 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M1231-1 | Abounding Security Inc Div of Maa Corp (USA) |
| 3M1231-1 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M1231-1 | The Boeing Company Div Defense (USA) |
NSN 5305-01-433-4092 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-433-4092 has 5 manufacturer part numbers on file: 3M1231-1 (Howmet Global Fastening Systems Inc), 3M1231-1 (Sps Technologies, Llc Dba PB Fasteners), 3M1231-1 (Abounding Security Inc Div of Maa Corp), 3M1231-1 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 3M1231-1 (The Boeing Company Div Defense).
Key specifications for 3M1231-1: Head Height: 0.080 INCHES MINIMUM AND 0.093 INCHES MAXIMUM IN; Fastener Length: 2.157 INCHES NOMINAL IN; Thread Length: 0.577 INCHES NOMINAL IN; Nominal Thread Diameter: 0.138 INCHES 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.