The Screw,close Tolerance, cataloged under National Stock Number 5305-01-497-0829, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Valley-Todeco, Inc. Dba Arconic Fastening Systems. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 19 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-497-0829 |
| Primary Part Number | 3M1170C4-2A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| Status | ACTIVE |
| Spline Minor Diameter | 0.1105 INCHES MINIMUM AND 0.1125 INCHES MAXIMUM IN |
| Fastener Length | 0.535 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Thread Length | 0.425 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spline Major Diameter | 0.1540 INCHES MINIMUM AND 0.1560 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | TORX |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | NICKEL ALLOY 718 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.358 INCHES MINIMUM AND 0.365 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 |
|---|---|
| 3M1170C4-2A PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| TX1027C4-2A PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M1170C4-2A PRIMARY | Saturn Fasteners Inc (USA) |
| TX1027C4-2A PRIMARY | Hi-Shear Corporation (USA) |
| 11845C4-2A PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| 11825C4-2A | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1027C4-2A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| TX1027C4-2A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M1170C4-2A | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| 3M1170C4-2A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| TX1027C4-2A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1170C4-2A | Houston Precision Fasteners I Lp (USA) |
| TX1027C4-2A PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M1170C4-2A PRIMARY | The Boeing Company Div Defense (USA) |
| TX1027C4-2A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| GS1014C4-2A PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M1170C4-2A PRIMARY | Heartland Precision Fasteners Inc (USA) |
| TX1027C4-2A PRIMARY | Huck International, Inc (USA) |
| WC1170C4-2A | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| TX1027C4-2A | 3/2 Design control — primary reference U.S. Government activity |
| TX1027C4-2A | 3/2 Design control — primary reference U.S. Government activity |
| TX1027C4-2A | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-497-0829 is a Screw,close Tolerance, manufactured by Valley-Todeco, Inc. Dba Arconic Fastening Systems, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-497-0829 has 19 manufacturer part numbers on file: 3M1170C4-2A (Valley-Todeco, Inc. Dba Arconic Fastening Systems), TX1027C4-2A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 3M1170C4-2A (Saturn Fasteners Inc), TX1027C4-2A (Hi-Shear Corporation), 11845C4-2A (Reid Products Inc. Dba Reid Products Inc) and 14 more.
Key specifications for 3M1170C4-2A: Spline Minor Diameter: 0.1105 INCHES MINIMUM AND 0.1125 INCHES MAXIMUM IN; Fastener Length: 0.535 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN; Thread Length: 0.425 INCHES NOMINAL IN; Material Document and Classification: AMS 5662 ASSN STD SINGLE MATERIAL 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.