The Screw,close Tolerance, cataloged under National Stock Number 5305-01-513-8731, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 11 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-513-8731 |
| Primary Part Number | TX1027C4D17AF |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Point Diameter | 0.425 INCHES NOMINAL IN |
| Fastener Length | 1.472 INCHES MINIMUM AND 1.502 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 | 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Grip Length | 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM IN |
| Grip Diameter | 0.249 INCHES NOMINAL 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 | 0.385 INCHES MINIMUM AND 0.394 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 |
|---|---|
| TX1027C4D17AF PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TX1027C4D17AF PRIMARY | Hi-Shear Corporation (USA) |
| TX1027C4D17AF PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| TX1027C4D17AF | Sps Technologies, Llc Dba PB Fasteners (USA) |
| TX1027C4D17AF | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| 3M1170C4D17AF | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1170C4D17AF | The Boeing Company Div Defense (USA) |
| TX1027C4D17AF PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| TX1027C4D17AF PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11825C4D17AF | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1170C4D17AF | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| Reference | Meaning |
|---|---|
| TX1027C4D17AF | 5/9 Secondary reference Sps Technologies Inc |
| TX1027C4D17AF | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-513-8731 is a Screw,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-513-8731 has 11 manufacturer part numbers on file: TX1027C4D17AF (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), TX1027C4D17AF (Hi-Shear Corporation), TX1027C4D17AF (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), TX1027C4D17AF (Sps Technologies, Llc Dba PB Fasteners), TX1027C4D17AF (Fairchild Fasteners Europe - Vsd Gmbh) and 6 more.
Key specifications for TX1027C4D17AF: Point Diameter: 0.425 INCHES NOMINAL IN; Fastener Length: 1.472 INCHES MINIMUM AND 1.502 INCHES MAXIMUM IN; Thread Length: 0.425 INCHES NOMINAL IN; Material Document and Classification: AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.