The Screw,close Tolerance, cataloged under National Stock Number 5305-01-485-5727, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-485-5727 |
| Primary Part Number | 3M1170C6-8A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Spline Minor Diameter | 0.1570 INCHES MINIMUM AND 0.1600 INCHES MAXIMUM IN |
| Fastener Length | 1.063 INCHES MINIMUM AND 1.093 INCHES MAXIMUM IN |
| Thread Length | 0.578 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 | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 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 | 0.524 INCHES MINIMUM AND 0.531 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 |
|---|---|
| TX1027C6-8A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TX1027C6-8A | Hi-Shear Corporation (USA) |
| 3M1170C6-8A PRIMARY | The Boeing Company Div Defense (USA) |
| 3M1170C6-8A PRIMARY | Saturn Fasteners Inc (USA) |
| 3M1170C6-8A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 11845C6-8A PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| WC1170C6-8A | West Coast Aerospace, Inc. (USA) |
| 11825C6-8A | Reid Products Inc. Dba Reid Products Inc (USA) |
| TX1027C6-8A | Howmet Global Fastening Systems Inc (USA) |
| TX1027C6-8A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| GS1014C6-8A PRIMARY | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M1170C6-8A PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| TX1027C6-8A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| TX1027C6-8A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1027C6-8A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TX1027C6-8A PRIMARY | Huck International, Inc (USA) |
| 3M1170C6-8A PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 3M1170C6-8A | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| TX1027C6-8A | 5/2 Secondary reference U.S. Government activity |
| TX1027C6-8A | 3/2 Design control — primary reference U.S. Government activity |
| TX1027C6-8A | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-485-5727 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-485-5727 has 18 manufacturer part numbers on file: TX1027C6-8A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), TX1027C6-8A (Hi-Shear Corporation), 3M1170C6-8A (The Boeing Company Div Defense), 3M1170C6-8A (Saturn Fasteners Inc), 3M1170C6-8A (Fastener Innovation Technology, Inc. Dba F I T) and 13 more.
Key specifications for 3M1170C6-8A: Spline Minor Diameter: 0.1570 INCHES MINIMUM AND 0.1600 INCHES MAXIMUM IN; Fastener Length: 1.063 INCHES MINIMUM AND 1.093 INCHES MAXIMUM IN; Thread Length: 0.578 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.