The Screw,close Tolerance, cataloged under National Stock Number 5305-01-512-8295, 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 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-512-8295 |
| Primary Part Number | 3M1170C5-20A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Spline Minor Diameter | 0.1570 INCHES MINIMUM AND 0.1600 INCHES MAXIMUM IN |
| Fastener Length | 1.704 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spline Major Diameter | 0.2195 INCHES MINIMUM AND 0.2225 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.313 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 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 | 24 |
| Material | NICKEL ALLOY 718 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.438 INCHES MINIMUM AND 0.445 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 | Y |
| Part Number | Manufacturer |
|---|---|
| TX1027C5-20A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TX1027C5-20A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TX1027C5-20A | Howmet Global Fastening Systems Inc (USA) |
| TX1027C5-20A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| 3M1170C5-20A PRIMARY | Heartland Precision Fasteners Inc (USA) |
| TX1027C5-20A PRIMARY | Hi-Shear Corporation (USA) |
| TX1027C5-20A | Huck International, Inc (USA) |
| 3M1170C5-20A | Houston Precision Fasteners I Lp (USA) |
| TX1027C5-20A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| WC1170C5-20A | West Coast Aerospace, Inc. (USA) |
| 3M1170C5-20A PRIMARY | The Boeing Company Div Defense (USA) |
| 3M1170C5-20A PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 11845C5-20A PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX10275C5-20A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| TX10275C5-20A | Hi-Shear Corporation (USA) |
| 3M1170C5-20A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| GS1014C5-20A PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 11825C5-20A | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1170C5-20A PRIMARY | Saturn Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| TX1027C5-20A | 5/2 Secondary reference U.S. Government activity |
| TX1027C5-20A | 5/9 Secondary reference Sps Technologies Inc |
| TX1027C5-20A | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-512-8295 is a Screw,close Tolerance, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-512-8295 has 19 manufacturer part numbers on file: TX1027C5-20A (Sps Technologies, Llc Dba PB Fasteners), TX1027C5-20A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), TX1027C5-20A (Howmet Global Fastening Systems Inc), TX1027C5-20A (Fairchild Fasteners Europe - Vsd Gmbh), 3M1170C5-20A (Heartland Precision Fasteners Inc) and 14 more.
Key specifications for 3M1170C5-20A: Spline Minor Diameter: 0.1570 INCHES MINIMUM AND 0.1600 INCHES MAXIMUM IN; Fastener Length: 1.704 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN; Thread Length: 0.469 INCHES NOMINAL IN; Criticality Code Justification: AGAV. 19 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.