The Screw,close Tolerance, cataloged under National Stock Number 5305-01-497-0842, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Heartland Precision Fasteners Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 18 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-497-0842 |
| Primary Part Number | 3M1170C3-9A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Spline Minor Diameter | 0.1105 INCHES MINIMUM AND 0.1125 INCHES MAXIMUM IN |
| Fastener Length | 0.8925 INCHES MINIMUM AND 0.9225 INCHES MAXIMUM IN |
| Thread Length | 0.345 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 | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.5525 INCHES MINIMUM AND 0.5725 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 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 | 32 |
| Material | NICKEL ALLOY 718 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.265 INCHES MINIMUM AND 0.272 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 |
|---|---|
| TX1027C3-9A | Howmet Global Fastening Systems Inc (USA) |
| TX1027C3-9A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| 3M1170C3-9A PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 3M1170C3-9A | Houston Precision Fasteners I Lp (USA) |
| GS1014C3-9A PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| TX1027C3-9A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| TX1027C3-9A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1027C3-9A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M1170C3-9A PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 11845C3-9A PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1027C3-9A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M1170C3-9A PRIMARY | The Boeing Company Div Defense (USA) |
| TX1027C3-9A | Hi-Shear Corporation (USA) |
| 3M1170C3-9A PRIMARY | Saturn Fasteners Inc (USA) |
| 3M1170C3-9A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| TX1027C3-9A PRIMARY | Huck International, Inc (USA) |
| 11825C3-9A | Reid Products Inc. Dba Reid Products Inc (USA) |
| WC1170C3-9A | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| TX1027C3-9A | 3/2 Design control — primary reference U.S. Government activity |
| TX1027C3-9A | 5/2 Secondary reference U.S. Government activity |
| TX1027C3-9A | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-497-0842 is a Screw,close Tolerance, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-497-0842 has 18 manufacturer part numbers on file: TX1027C3-9A (Howmet Global Fastening Systems Inc), TX1027C3-9A (Fairchild Fasteners Europe - Vsd Gmbh), 3M1170C3-9A (Heartland Precision Fasteners Inc), 3M1170C3-9A (Houston Precision Fasteners I Lp), GS1014C3-9A (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace) and 13 more.
Key specifications for 3M1170C3-9A: Spline Minor Diameter: 0.1105 INCHES MINIMUM AND 0.1125 INCHES MAXIMUM IN; Fastener Length: 0.8925 INCHES MINIMUM AND 0.9225 INCHES MAXIMUM IN; Thread Length: 0.345 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.